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Status: Legacy / discontinued
A 4-bay desktop NVR from 2020 built for AI video surveillance, with a dedicated NVIDIA GTX 1650 that runs the deep learning analytics. It has 8 GB of RAM (up to 32 GB) and hot-swap bays, and you can grow to 14 bays with two DX517 units. It's a surveillance box first - not the pick for general file storage.
| Series | x21 Series |
|---|---|
| Bays | 4 |
| CPU | Intel Atom C3538 |
| Cores / Threads | 4 / 4 |
| RAM | 8 GB |
| CPU architecture | x86_64 |
| Support tier | full |
| Warranty (years) | 3 |
| Release year | 2020 |
| RAID levels | Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, SHR, SHR-2 |
| RAM (max) | 32 GB |
| Memory slots | 2 |
| Memory generation | DDR4 |
| ECC memory | Supported |
| Network ports | 4x 1GbE |
| USB ports | 3x USB 3.2 |
| PCIe expansion | None |
| M.2 slots | None |
| Max raw capacity | 64 |
| Drive bay types | 3.5" SATA HDD, 3.5" SATA SSD, 2.5" SATA HDD, 2.5" SATA SSD |
| Hot-swappable bays | Yes |
| CPU frequency (GHz) | 2.1 |
| Dimensions H x W x D | 6.5 x 9.8 x 9.3 in (166 x 250 x 237 mm) |
| Weight | 10.8 lb (4.92 kg) |
| Estimated cost to fill every bay with a certified 8 TB drive | about $1,200 new (Western Digital WD80EFPX) / about $2,511 refurbished (Seagate ST8000VN0002) / about $800 used (Synology HAT5310-8T) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified |
| Estimated cost to fill every bay with a certified 16 TB drive | about $1,900 new (Seagate ST16000NM001G) / about $2,796 refurbished (Seagate ST16000VN001) / about $1,520 used (Seagate ST16000NM001G) -- one observed eBay unit price incl. shipping x bays; quantity availability unverified |
8 eBay listings checked Nov 8, 2026 · 0 new, 2 used
Documents
Compatible Drives
164 drives certified on DVA3221's official manufacturer compatibility list, sourced directly from Synology's own published Hardware Compatibility List. Each model links to that drive's own compatibility page.
164certified models
6drive brands
24 TBlargest listed
141with verified extra specs
Certified drives by capacity
0.48 TB4
0.96 TB4
1 TB3
1.2 TB1
1.92 TB4
2 TB11
3 TB9
3.84 TB4
4 TB26
6 TB23
8 TB27
10 TB11
12 TB16
14 TB10
16 TB6
18 TB1
20 TB3
24 TB1
Show all 164 certified drives
164 shown
| Brand | Model | Capacity | Type | Verified drive details | Recently observed offers | Status | Firmware |
|---|---|---|---|---|---|---|---|
| Synology | HAT5320-24T details | 24.0 TB | 3.5" NAS HDD | 7200 RPM · 1024 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $1,440.78 | Recommended | 1401 |
| Synology | HAT5310-20T details | 20.0 TB | 3.5" Enterprise HDD | 7200 RPM · 512 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $899.95 · Used: $1,451.11 | Recommended | 1401 |
| Synology | HAT3320-20T details | 20.0 TB | 3.5" NAS HDD | 7200 RPM · 1024 MB cache · CMR · 180 TB/year workload · 1200000 h MTBF · 3-year warranty | New: $806.19 · Used: $780.00 | Recommended | 1401 |
| Synology | HAT5320-20T details | 20.0 TB | 3.5" NAS HDD | 7200 RPM · 1024 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $1,407.45 | Recommended | 1402 |
| Synology | HAT5310-18T details | 18.0 TB | 3.5" Enterprise HDD | 7200 RPM · 512 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | No recent verified offer | Recommended | 1401 |
| Seagate | ST16000VN001 details | 16.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $605.00 · Refurb: $699.00 | Recommended | SC60 |
| Synology | HAT5300-16T details | 16.0 TB | 3.5" Enterprise HDD | 7200 RPM · 512 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $789.97 · Used: $399.00 | Recommended | 1402 |
| Seagate | ST16000NM001G details | 16.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $475.00 · Used: $379.95 | Recommended | SN02 |
| Synology | HAT5310-16T details | 16.0 TB | 3.5" Enterprise HDD | 7200 RPM · 512 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $1,047.99 | Recommended | 1403 |
| Seagate | ST16000VE000 details | 16.0 TB | 3.5" Surveillance HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $589.95 · Used: $385.00 | Recommended | EV02 |
| Synology | HAT3310-16T details | 16.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 180 TB/year workload · 1200000 h MTBF · 3-year warranty | New: $693.99 · Used: $505.00 | Recommended | 1402 |
| Toshiba | MN07ACA14T details | 14.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · 180 TB/year workload · 1000000 h MTBF | No recent verified offer | Recommended | 0601 |
| Western Digital | WD140EFFX details | 14.0 TB | 3.5" NAS HDD | 5400 RPM · 512 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $578.80 · Used: $379.00 | Recommended | 81.00A81 |
| Western Digital | WD140EFGX details | 14.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 85.00A85 |
| Toshiba | HDWG21EEZSTA details | 14.0 TB | 3.5" NAS HDD | 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG21EYZSTA details | 14.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Seagate | ST14000VE0008 details | 14.0 TB | 3.5" Surveillance HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $434.84 | Recommended | EV02 |
| Toshiba | HDWG21EXZSTA details | 14.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Seagate | ST14000VN0008 details | 14.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $435.23 · Used: $349.99 | Recommended | SC61 |
| Toshiba | HDWG21EUZSVA details | 14.0 TB | 3.5" NAS HDD | 7200 RPM · CMR · 180 TB/year workload | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG21EAZSTA details | 14.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| HGST | HUH721212ALE604 details | 12.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | No recent verified offer | Recommended | - |
| HGST | HUH721212ALE600 details | 12.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $430.00 · Used: $244.99 | Recommended | LEGNT3D0 |
| Seagate | ST12000VN0008 details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $413.88 · Used: $387.02 | Recommended | SC60 |
| Seagate | ST12000NM001G details | 12.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $442.00 · Used: $374.99 | Recommended | SN02 |
| Western Digital | WD120EFBX details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 85.00A85 |
| Synology | HAT5300-12T details | 12.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $589.99 · Used: $379.99 | Recommended | 1401 |
| Synology | HAT3300-12T details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | PL01 |
| Toshiba | HDWG21CYZSTA details | 12.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Seagate | ST12000VE0008 details | 12.0 TB | 3.5" Surveillance HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $458.16 | Recommended | EV02 |
| Western Digital | WD120EFAX details | 12.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | Used: $489.00 | Recommended | 81.00A81 |
| Toshiba | HDWG21CAZSTA details | 12.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG21CEZSTA details | 12.0 TB | 3.5" NAS HDD | 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | MN07ACA12T details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | Used: $1,082.45 | Recommended | 0601 |
| Synology | HAT3310-12T details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 180 TB/year workload · 1200000 h MTBF · 3-year warranty | New: $465.00 | Recommended | 1402 |
| Toshiba | HDWG21CXZSTA details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG21CUZSVA details | 12.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG11AAZSTA details | 10.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Western Digital | WD101EFAX details | 10.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $999.00 | Recommended | 81.00A81 |
| Toshiba | HDWG11AEZSTA details | 10.0 TB | 3.5" NAS HDD | 3-year warranty | No recent verified offer | Recommended | 0603 |
| Western Digital | WD101EFBX details | 10.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 85.00A85 |
| Seagate | ST10000VN000 details | 10.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $497.83 | Recommended | SC60 |
| Seagate | ST10000VE0008 details | 10.0 TB | 3.5" Surveillance HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $410.00 · Used: $249.99 | Recommended | EV02 |
| Toshiba | MN06ACA10T details | 10.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG11AUZSVA details | 10.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | Used: $326.00 | Recommended | 0603 |
| Toshiba | HDWG11AYZSTA details | 10.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG11AXZSTA details | 10.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0603 |
| Seagate | ST10000VN0008 details | 10.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $406.00 · Used: $279.90 | Recommended | SC61 |
| Toshiba | HDWG180YZSTA details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG480YZSTA details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Seagate | ST8000VN0002 details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $526.58 · Refurb: $627.64 | Recommended, EOL | SC60 |
| Toshiba | HDWG180EZSTA details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | MN06ACA800 details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG180AZSTA details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| HGST | HUH721008ALE600 details | 8.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | Used: $248.51 | Recommended | - |
| Synology | HAT3320-8T details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 300 TB/year workload · 1200000 h MTBF · 3-year warranty | New: $644.82 | Recommended | 1401 |
| Western Digital | WD80EFZZ details | 8.0 TB | 3.5" NAS HDD | 5640 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $349.00 | Recommended | 81.00A81 |
| Toshiba | HDWG180XZSTA details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG180UZSVA details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 3-year warranty | New: $580.48 | Recommended | 0603 |
| Toshiba | HDWG480AZSTA details | 8.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Synology | HAT3310-8T details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1200000 h MTBF · 3-year warranty | New: $405.00 · Used: $295.00 | Recommended | 1403 |
| Synology | HAT5310-8T details | 8.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $1,035.21 · Used: $199.99 | Recommended | 1402 |
| Synology | HAT5320-8T details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $702.17 | Recommended | 1401 |
| Seagate | ST8000NM000A details | 8.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $413.00 · Used: $249.00 | Recommended | SN02 |
| Synology | HAT3300-8T details | 8.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | Used: $299.99 | Recommended | PL01 |
| Toshiba | HDWG480XZSTA details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 180 TB/year workload · 1200000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0601 |
| Seagate | ST8000VN002 details | 8.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $390.64 | Recommended | SC60 |
| Western Digital | WD80EFPX details | 8.0 TB | 3.5" NAS HDD | 5640 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $299.95 · Used: $637.75 | Recommended | 81.00A81 |
| Seagate | ST8000VN004 details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $329.99 | Recommended | SC60 |
| Toshiba | MN08ADA800 details | 8.0 TB | 3.5" NAS HDD | 256 MB cache · 1000000 h MTBF | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG480UZSVA details | 8.0 TB | 3.5" NAS HDD | 256 MB cache · CMR | No recent verified offer | Recommended | 0601 |
| Synology | HAT5300-8T details | 8.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2500000 h MTBF · 5-year warranty | New: $1,009.00 · Used: $225.00 | Recommended | 1401 |
| Toshiba | HDWG480EZSTA details | 8.0 TB | 3.5" NAS HDD | 3-year warranty | No recent verified offer | Recommended | 0601 |
| Western Digital | WD80EFZX details | 8.0 TB | 3.5" NAS HDD | 5640 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $339.98 · Used: $205.00 | Recommended | 81.00A81 |
| Western Digital | WD80EFBX details | 8.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $300.00 | Recommended | 85.00A85 |
| Toshiba | HDWG460AZSTA details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG160EZSTA details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG460EZSTA details | 6.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG460UZSVA details | 6.0 TB | 3.5" NAS HDD | 256 MB cache · CMR · 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG160UZSVA details | 6.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0603 |
| Synology | HAT3300-6T details | 6.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $326.49 · Used: $211.00 | Recommended | PL01 |
| Western Digital | WD60EFPX details | 6.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $315.04 | Recommended | 81.00A81 |
| Seagate | ST6000VN006 details | 6.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $212.58 | Recommended | SC60 |
| Toshiba | MN08ADA600 details | 6.0 TB | 3.5" NAS HDD | 256 MB cache · 1000000 h MTBF | No recent verified offer | Recommended | 0601 |
| Seagate | ST6000VN001 details | 6.0 TB | 3.5" Enterprise HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $218.61 | Recommended | SC60 |
| Toshiba | MN06ACA600 details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Western Digital | WD60PURX details | 6.0 TB | 3.5" Surveillance HDD | 7200 RPM · 64 MB cache · CMR · 180 TB/year workload · 1500000 h MTBF · 3-year warranty | New: $299.99 · Refurb: $169.99 | Recommended | 80.00A80 |
| Toshiba | HDWG460YZSTA details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Seagate | ST6000VX001 details | 6.0 TB | 3.5" Surveillance HDD | 5900 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $249.99 · Refurb: $275.00 | Recommended | CV11 |
| Toshiba | HDWG160AZSTA details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Western Digital | WD60PURZ details | 6.0 TB | 3.5" Surveillance HDD | 5700 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $310.00 · Refurb: $189.99 | Recommended | 80.00A80 |
| Western Digital | WD60EFZX details | 6.0 TB | 3.5" NAS HDD | 5640 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $300.00 · Used: $552.29 | Recommended | 81.00A81 |
| Toshiba | HDWG460XZSTA details | 6.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 180 TB/year workload · 1200000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG160XZSTA details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Toshiba | HDWG160YZSTA details | 6.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0603 |
| Western Digital | WD60EJRX details | 6.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | - |
| Western Digital | WD6003FFBX details | 6.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $479.06 | Recommended | 83.00A83 |
| Seagate | ST6000NM021A details | 6.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $200.67 · Refurb: $220.00 | - | SN01 |
| Toshiba | HDWG440YZSTA details | 4.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Western Digital | WD40PURX details | 4.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $136.00 · Refurb: $139.99 | Recommended | 80.00A80 |
| Toshiba | HDWQ140UZSVA details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | Used: $298.99 | Recommended | - |
| Toshiba | HDWQ140EZSTA details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | - |
| Western Digital | WD40PURZ details | 4.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $139.58 · Used: $108.00 | Recommended | - |
| Western Digital | WD4003FFBX details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $289.19 · Used: $404.10 | Recommended | - |
| Synology | HAT3300-4T details | 4.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $351.38 · Used: $175.00 | Recommended | PL01 |
| Seagate | ST4000VN008 details | 4.0 TB | 3.5" NAS HDD | 5900 RPM · 256 MB cache · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $136.25 · Refurb: $165.00 | Recommended | SC60 |
| Seagate | ST4000NE001 details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · 300 TB/year workload · 1200000 h MTBF · 5-year warranty | New: $139.17 · Used: $149.99 | Recommended | EN01 |
| Synology | HAT5300-4T details | 4.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | No recent verified offer | Recommended | 1403 |
| Toshiba | HDWG440AZSTA details | 4.0 TB | 3.5" NAS HDD | - | No recent verified offer | Recommended | 0601 |
| Toshiba | HDWG440UZSVA details | 4.0 TB | 3.5" NAS HDD | 256 MB cache · CMR | No recent verified offer | Recommended | 0601 |
| Western Digital | WD40EFPX details | 4.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $133.98 | Recommended | 81.00A81 |
| Seagate | ST4000VN006 details | 4.0 TB | 3.5" NAS HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $161.57 · Used: $159.99 | Recommended | SC60 |
| Toshiba | HDWG440EZSTA details | 4.0 TB | 3.5" NAS HDD | 3-year warranty | No recent verified offer | Recommended | 0601 |
| Toshiba | MN08ADA400E details | 4.0 TB | 3.5" NAS HDD | 256 MB cache · 1000000 h MTBF | No recent verified offer | Recommended | 0601 |
| Synology | HAT5320-4T details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 512 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $577.10 | Recommended | 1401 |
| Toshiba | MN04ACA400 details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · 180 TB/year workload · 1000000 h MTBF | No recent verified offer | Recommended | FJ1M |
| Seagate | ST4000NM002A details | 4.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $139.99 · Used: $79.99 | Recommended | SN02 |
| Toshiba | HDWQ140AZSTA details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · 180 TB/year workload · 1000000 h MTBF | No recent verified offer | Recommended | - |
| Toshiba | HDWQ140XZSTA details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · 180 TB/year workload · 1000000 h MTBF | No recent verified offer | Recommended | - |
| Toshiba | HDWG440XZSTA details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | 0601 |
| Western Digital | WD40EFZX details | 4.0 TB | 3.5" NAS HDD | 5400 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $138.50 · Used: $275.00 | Recommended | 81.00B81 |
| Toshiba | MG04ACA400E details | 4.0 TB | 3.5" Enterprise HDD | 7200 RPM · 128 MB cache · CMR · 550 TB/year workload · 1400000 h MTBF · 5-year warranty | New: $272.83 · Refurb: $175.00 | Recommended | FP4B |
| Toshiba | HDWQ140YZSTA details | 4.0 TB | 3.5" NAS HDD | 7200 RPM · 128 MB cache · 180 TB/year workload · 1000000 h MTBF | No recent verified offer | Recommended | - |
| Western Digital | WD40EJRX details | 4.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1500000 h MTBF · 3-year warranty | New: $134.32 | Recommended | - |
| Synology | SAT5220-3840G details | 3.84 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 7000 TBW | No recent verified offer | Recommended | SCEMH5.0 |
| Synology | SAT5200-3840G details | 3.84 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 9162 TBW | No recent verified offer | Recommended | SCEMJ2.1 |
| Synology | SAT5221-3840G details | 3.84 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 7000 TBW | New: $2,642.47 | Recommended | SCEM16.3 |
| Synology | SAT5210-3840G details | 3.84 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 8533 TBW | No recent verified offer | - | SCEMH3.1 |
| Seagate | ST3000VN007 details | 3.0 TB | 3.5" NAS HDD | 5900 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $199.98 · Refurb: $154.00 | Recommended | - |
| Western Digital | WD30EFZX details | 3.0 TB | 3.5" NAS HDD | 5400 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $92.71 | Recommended | 81.00B81 |
| Western Digital | WD30PURZ details | 3.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $358.17 · Used: $79.00 | Recommended | - |
| Seagate | ST3000VX009 details | 3.0 TB | 3.5" Surveillance HDD | 5900 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $129.90 · Used: $69.99 | Recommended | CV11 |
| Western Digital | WD30EFPX details | 3.0 TB | 3.5" NAS HDD | 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $457.98 · Used: $339.47 | Recommended | 81.00A81 |
| Seagate | ST3000VN006 details | 3.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $288.30 | Recommended | SC60 |
| Western Digital | WD30EJRX details | 3.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 3-year warranty | No recent verified offer | Recommended | - |
| Western Digital | WD30PURX details | 3.0 TB | 3.5" Surveillance HDD | 7200 RPM · 64 MB cache · CMR · 180 TB/year workload · 1500000 h MTBF · 3-year warranty | New: $83.48 · Used: $69.00 | Recommended | - |
| Toshiba | MG04ACA300E details | 3.0 TB | 3.5" Enterprise HDD | 7200 RPM · 128 MB cache · CMR · 550 TB/year workload · 1400000 h MTBF · 5-year warranty | New: $284.00 · Used: $59.99 | Recommended | FP4B |
| Seagate | ST2000VN004 details | 2.0 TB | 3.5" NAS HDD | 5900 RPM · 256 MB cache · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $79.72 · Used: $89.99 | Recommended | - |
| HGST | HUS722T2TALA604 details | 2.0 TB | 3.5" Enterprise HDD | 7200 RPM · 128 MB cache · CMR · 2000000 h MTBF · 5-year warranty | New: $286.30 · Used: $114.99 | Recommended | RAGNWA07 |
| Western Digital | WD20EFZX details | 2.0 TB | 3.5" NAS HDD | 5400 RPM · 128 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $167.76 · Used: $268.52 | Recommended | 81.00B81 |
| Western Digital | WD20PURZ details | 2.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $84.63 · Used: $70.29 | Recommended | - |
| Seagate | ST2000VN003 details | 2.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $280.64 · Used: $178.17 | Recommended | SC60 |
| Western Digital | WD20PURX details | 2.0 TB | 3.5" Surveillance HDD | 7200 RPM · 64 MB cache · CMR · 180 TB/year workload · 1500000 h MTBF · 3-year warranty | New: $82.56 · Used: $78.15 | Recommended | - |
| Western Digital | WD20EJRX details | 2.0 TB | 3.5" Surveillance HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $83.07 · Refurb: $79.99 | Recommended | - |
| Toshiba | MG04ACA200E details | 2.0 TB | 3.5" Enterprise HDD | 7200 RPM · 128 MB cache · CMR · 550 TB/year workload · 1400000 h MTBF · 5-year warranty | New: $187.50 · Refurb: $300.00 | Recommended | FP4B |
| Synology | HAT3300-2T details | 2.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $677.05 · Used: $139.99 | Recommended | PL01 |
| Western Digital | WD20EFPX details | 2.0 TB | 3.5" NAS HDD | 5400 RPM · 64 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $227.87 · Used: $265.25 | Recommended | 81.00A81 |
| Seagate | ST2000NM001A details | 2.0 TB | 3.5" Enterprise HDD | 7200 RPM · 256 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | Refurb: $272.83 · Used: $49.00 | Recommended | SN02 |
| Synology | SAT5220-1920G details | 1.92 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 3500 TBW | New: $799.99 | Recommended | SCEMH5.0 |
| Synology | SAT5221-1920G details | 1.92 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 3500 TBW | New: $2,200.01 · Refurb: $2,272.83 | Recommended | SCEM16.3 |
| Synology | SAT5200-1920G details | 1.92 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 4581 TBW | No recent verified offer | Recommended | SCEMJ2.1 |
| Synology | SAT5210-1920G details | 1.92 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 4800 TBW | No recent verified offer | - | SCEMH3.2 |
| Intel | SSDSC2BB012T6 details | 1.2 TB | 2.5" Enterprise SSD | 2000000 h MTBF · 5-year warranty · 660 TBW | New: $307.00 · Used: $129.00 | Recommended, EOL | - |
| HGST | HUS722T1TALA604 details | 1.0 TB | 3.5" Enterprise HDD | 7200 RPM · 128 MB cache · CMR · 550 TB/year workload · 2000000 h MTBF · 5-year warranty | New: $119.99 · Refurb: $202.10 | Recommended | - |
| Seagate | ST1000VN008 details | 1.0 TB | 3.5" NAS HDD | 5400 RPM · 256 MB cache · CMR · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | No recent verified offer | Recommended | SC60 |
| Seagate | ST1000VN002 details | 1.0 TB | 3.5" NAS HDD | 5900 RPM · 64 MB cache · 180 TB/year workload · 1000000 h MTBF · 3-year warranty | New: $123.00 · Used: $59.99 | Recommended | - |
| Synology | SAT5200-960G details | 0.96 TB | 2.5" Enterprise SSD | 2048 MB cache · 1500000 h MTBF · 5-year warranty · 2290 TBW | No recent verified offer | Recommended | SCEMJ2.1 |
| Synology | SAT5221-960G details | 0.96 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 1700 TBW | New: $1,177.29 | Recommended | F3MN902 |
| Synology | SAT5220-960G details | 0.96 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 1700 TBW | No recent verified offer | Recommended | SCEMH5.0 |
| Synology | SAT5210-960G details | 0.96 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 2194 TBW | New: $489.00 | - | SCEMH3.2 |
| Synology | SAT5220-480G details | 0.48 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 900 TBW | No recent verified offer | Recommended | SCEMH5.0 |
| Synology | SAT5221-480G details | 0.48 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 900 TBW | No recent verified offer | Recommended | F3MN902 |
| Synology | SAT5200-480G details | 0.48 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 1145 TBW | No recent verified offer | Recommended | SCEMJ2.1 |
| Synology | SAT5210-480G details | 0.48 TB | 2.5" Enterprise SSD | 1500000 h MTBF · 5-year warranty · 1097 TBW | No recent verified offer | - | SCEMH3.1 |
Extra drive details are published only from manufacturer-owned documents or explicit human review. Follow the model link for field-level sources.
Certified list last checked 2026-08-18.
Compatible Memory
2 memory modules listed by Synology as compatible with DVA3221. Third-party modules may also work, but are not shown here unless Synology itself lists them as compatible.
2certified modules
16–16 GBcapacity range
| SKU | Capacity | DDR generation | ECC | Form factor | Rated speed | Warranty | Source and notes | Buy |
|---|---|---|---|---|---|---|---|---|
| D4ECSO-2666-16G | 16 GB | DDR4 | ECC | SODIMM | 2666 MT/s | 5-year | Manufacturer source Checked 2026-09-16 | Amazon eBay |
| D4ES03-16G | 16 GB | DDR4 | ECC | SODIMM | - | 5-year | Manufacturer source Checked 2026-09-16 | Amazon eBay |
Certified list last checked 2026-09-16. Coverage varies by model. Rated module speed is not a guarantee of NAS operating speed; follow the NAS maximum capacity and installation rules.
Looking for cameras compatible with Synology NAS units? See the full Synology camera compatibility database.