Western Digital Red SA500 4TB
NAS SSD
Part number WDS400T2R0A-68CKB0 · Red SA500 series · 2.5" SATA SSD. If your machine is listed below, this drive is officially supported — not a forum workaround.
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This is an SSD — an excellent cold copy for the off-site slot of a 3-2-1 plan: fast sequential transfer, silent, no moving parts to degrade on the shelf. The one catch is charge retention: a powered-off NVMe/SATA SSD slowly loses charge (weeks to months), which matters for a copy that sits unplugged. Keep the offline copy plugged in for a few hours once a month, or keep the 3-2-1 'other' copy on spinning media instead. Pair it with a scheduled backup job — see the backup software encyclopedia (Veeam, Duplicati, Hyper Backup) and the 3-2-1 rule.
Compatibility verdict
It appears on the official compatibility lists of 1 machines and series — 1 Synology. This is a NAS-class drive: built for 24/7 operation with vibration compensation for multi-bay enclosures — the right tier for most 1-8 bay home or small-office NAS units. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.
Compatible NAS models
Same-capacity alternatives
Other drives listed at 4 TB capacity, ranked by how many machines list them:
Quick answers
Is the WDS400T2R0A-68CKB0 officially compatible with my NAS?
It appears on the official compatibility lists of 1 machines and series — 1 Synology. Every machine page linked below shows the vendor's own list entry, refreshed daily.
Is the WDS400T2R0A-68CKB0 a good NAS drive?
This is a NAS-class drive: built for 24/7 operation with vibration compensation for multi-bay enclosures — the right tier for most 1-8 bay home or small-office NAS units. No series-level recording rating is on file for this part number yet, so check CMR vs SMR on the exact model before buying for an array.
Can I use the WDS400T2R0A-68CKB0 for a 3-2-1 cold backup copy?
This is an SSD — an excellent cold copy for the off-site slot of a 3-2-1 plan: fast sequential transfer, silent, no moving parts to degrade on the shelf. The one catch is charge retention: a powered-off NVMe/SATA SSD slowly loses charge (weeks to months), which matters for a copy that sits unplugged. Keep the offline copy plugged in for a few hours once a month, or keep the 3-2-1 'other' copy on spinning media instead. Pair it with a scheduled backup job — see the backup software encyclopedia (Veeam, Duplicati, Hyper Backup) and the 3-2-1 rule.
What are alternatives to the WDS400T2R0A-68CKB0?
At the same capacity, the most widely listed alternatives are Toshiba MG04ACA400E (451 machines), Western Digital WD4003FFBX (390 machines), Seagate ST4000NE0015 (379 machines). The full ranked list is below.