Western Digital 400GB
Desktop HDD
Part number HDS724040KLSA80 · 3.5" SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.
Check HDS724040KLSA80 price on Amazon partner link
No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.
Compatibility verdict
It appears on the official compatibility lists of 66 machines and series — 66 Synology. Check the class badge above: drives tagged NAS or Enterprise are built for 24/7 multi-bay operation. Desktop-class drives often lack vibration resistance and are usually absent from vendor HCLs. 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 400 GB capacity, ranked by how many machines list them:
Quick answers
Is the HDS724040KLSA80 officially compatible with my NAS?
It appears on the official compatibility lists of 66 machines and series — 66 Synology. Every machine page linked below shows the vendor's own list entry, refreshed daily.
Is the HDS724040KLSA80 a good NAS drive?
Check the class badge above: drives tagged NAS or Enterprise are built for 24/7 multi-bay operation. Desktop-class drives often lack vibration resistance and are usually absent from vendor HCLs. 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 HDS724040KLSA80 for a 3-2-1 cold backup copy?
No series-level recording rating is on file for this part number yet — check the exact model for CMR vs SMR before buying it as a large cold copy (SMR is the one trait that makes a 16 TB+ backup copy painfully slow). The 3-2-1 guide and the backup tools encyclopedia cover what to schedule it with.
What are alternatives to the HDS724040KLSA80?
At the same capacity, the most widely listed alternatives are Intel SSDSC2BA400G4 (130 machines), Intel SSDSC2BX400G4 (111 machines), Intel SSDSC2BA400G3 (102 machines). The full ranked list is below.