Western Digital WD40EFRX

4.0 TB 3.5" HDD · certified on 366 NAS models

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Capacity4.0 TB
Form factor3.5"
TypeHDD
InterfaceSATA
SeriesRed
Vendor part numbersRed NASware 3.0 · Red NASware 2.0
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Certified on 145 Synology NAS models

Synology marks this drive recommended (not merely compatible) on 145 of them.

Show all 145 Synology models

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

Certified on 221 QNAP NAS models

Show all 221 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.