Toshiba MD04ACA*** 4TB
Desktop HDD
Part number MD04ACA400 · MD04ACA*** series · 3.5" SATA HDD. If your machine is listed below, this drive is officially supported — not a forum workaround.
Part of the Toshiba MD04ACA*** series →
Check MD04ACA400 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 253 machines and series — 106 Synology, 145 QNAP, 2 Asustor. 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 4 TB capacity, ranked by how many machines list them:
Quick answers
Is the MD04ACA400 officially compatible with my NAS?
It appears on the official compatibility lists of 253 machines and series — 106 Synology, 145 QNAP, 2 Asustor. Every machine page linked below shows the vendor's own list entry, refreshed daily.
Is the MD04ACA400 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 MD04ACA400 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 MD04ACA400?
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.