JoshBytes

NAS / Drives

NAS

Western Digital WD4003FFBX

4.0 TB 3.5" NAS HDD ยท certified on 371 NAS models

← All Western Digital drives · All drives

Built for a NAS bay: 24/7 duty cycle, vibration tolerance for multi-drive chassis, and firmware tuned for RAID rebuild behaviour.

Capacity4.0 TB
Form factor3.5"
TypeHDD
InterfaceSATA
SeriesRed Pro
ClassNAS
Spindle speed7200 RPM source
Cache256 MB source
Warranty5 years source

Recently observed offers

New: $289.19 incl. listed shipping Checked 2026-10-07
Used: $139.94 incl. listed shipping Checked 2026-10-07

Cheapest exact-model fixed-price listing found per condition (New, Refurbished, Used) -- shown only for conditions with a real match, checked within three days of this page build. Availability and shipping may change; confirm at the seller.

Search on Amazon Search on eBay

Certified on 110 Synology NAS models

Synology marks this drive recommended (not merely compatible) on 109 of them.

Show all 110 Synology models

★ marks the models where the manufacturer lists this drive as recommended.

Certified on 261 QNAP NAS models

Show all 261 QNAP models

The certified list above comes from Synology's and QNAP's published Hardware Compatibility List. Certification is the manufacturer's statement, not a test performed here.