NAS Drive Compatibility

Compatible hard drives for QNAP TS-h665U

49 drives are on QNAP's official compatibility list for the TS-h665U, up to 26TB listed. Read from qnap.com, list refreshed 2026-11-03.

6-bay

Intel 4-core processor · 8 GB SODIMM DDR5 · max 16 GB (1 x 16GB)

QNAP
CPUIntel 4-core processor
Architecture64-bit x86
Memory (as shipped)8 GB SODIMM DDR5
Maximum memory16 GB (1 x 16GB)
Drive baysFront: 4 x 3.5-inch Rear:2 x E1.S/M.2 NVMe Gen3 x1 slots
49
Listed drives
2
NAS line
47
Enterprise line
0
SSD & surveillance

This vendor publishes its compatibility list as an advisory tested matrix — drives not on it are not firmware-blocked. Treat the list as a quality signal; off-list drives work but fall outside the tested pairing.

Capacity range on the official list

26TB (3) 24TB (4) 22TB (1) 20TB (6) 18TB (7) 16TB (7) 14TB (5) 14TB & below (16)

Where to start on the TS-h665U

For a home or small-office workload, the NAS lines below balance sustained writes and RAID-rebuild tolerance. Enterprise speed is only worth paying for in full-bay builds:

Full TS-h665U compatibility list

Grouped by part number; Max shows the largest capacity QNAP lists. Filter by brand, line or capacity:

DriveBrandSeriesLineTypeMax listed
WD261KRYZ Western Digital WD GOLD Enterprise SATA 6Gb/s (SATA III) 26 TB
WUH722626ALE6L1 Western Digital Ultrastar DC HC590 Enterprise SATA 6Gb/s (SATA III) 26 TB
WUH722626ALE6L4 Western Digital Ultrastar DC HC590 Enterprise SATA 6Gb/s (SATA III) 26 TB
0F65642 (WUH722624ALE6L1) Western Digital Ultrastar DC HC590 Enterprise SATA 6Gb/s (SATA III) 24 TB
0F65684 (WUH722624ALE6L4) Western Digital Ultrastar DC HC590 Enterprise SATA 6Gb/s (SATA III) 24 TB
ST24000NM002H Seagate EXOS X24 Enterprise SATA 6Gb/s (SATA III) 24 TB
WD242KRYZ Western Digital WD GOLD Enterprise SATA 6Gb/s (SATA III) 24 TB
ST22000NM001E Seagate EXOS X22 Enterprise SATA 6Gb/s (SATA III) 22 TB
0B48719 (WUH722020CLE6L1) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 20 TB
0B48724 (WUH722020CLE6L4) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 20 TB
ST20000NM002H Seagate EXOS X24 Enterprise SATA 6Gb/s (SATA III) 20 TB
ST20000NM004E Seagate EXOS X22 Enterprise SATA 6Gb/s (SATA III) 20 TB
ST20000NM007D Seagate EXOS x20 Enterprise SATA 6Gb/s (SATA III) 20 TB
WD203KRYZ Western Digital Gold Enterprise Enterprise SATA 6Gb/s (SATA III) 20 TB
0B48718 (WUH722018CLE6L1) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 18 TB
0B48723 (WUH722018CLE6L4) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 18 TB
ST18000NM000J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 18 TB
ST18000NM001J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 18 TB
ST18000NM003D Seagate EXOS x20 Enterprise SATA 6Gb/s (SATA III) 18 TB
WD181KFGX-68AFPN0 Western Digital Red Pro NAS SATA 6Gb/s (SATA III) 18 TB
WD181KRYZ    Western Digital Gold Enterprise Enterprise SATA 6Gb/s (SATA III) 18 TB
0B48717 (WUH722016CLE6L1) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 16 TB
0B48722 (WUH722016CLE6L4) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 16 TB
ST16000NM000J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 16 TB
ST16000NM001J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 16 TB
ST16000NM002H Seagate EXOS X24 Enterprise SATA 6Gb/s (SATA III) 16 TB
WD161KFGX-68AFPN0 Western Digital Red Pro NAS SATA 6Gb/s (SATA III) 16 TB
WD161KRYZ    Western Digital Gold Enterprise Enterprise SATA 6Gb/s (SATA III) 16 TB
0B48716 (WUH722014CLE6L1) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 14 TB
0B48721 (WUH722014CLE6L4) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 14 TB
ST14000NM000J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 14 TB
ST14000NM001J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 14 TB
WD142KRYZ     Western Digital Gold Enterprise Enterprise SATA 6Gb/s (SATA III) 14 TB
0B48715 (WUH722012CLE6L1) Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 12 TB
ST12000NM000J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 12 TB
ST12000NM001J Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 12 TB
ST12000NM002H Seagate EXOS X24 Enterprise SATA 6Gb/s (SATA III) 12 TB
WUH722012CLE6L4 Western Digital Ultrastar DC HC555 Enterprise SATA 6Gb/s (SATA III) 12 TB
ST10000NM017B-2TL103 Seagate EXOS 7E10 Enterprise SATA 6Gb/s (SATA III) 10 TB
ST10000NM018G-3CD103 Seagate EXOS x18 Enterprise SATA 6Gb/s (SATA III) 10 TB
ST10000NM021H Seagate EXOS X24 Enterprise SATA 6Gb/s (SATA III) 10 TB
HUS728T8TALE6L1 Western Digital Ultrastar DC HC320 Enterprise SATA 6Gb/s (SATA III) 8 TB
HUS728T8TALE6L4 Western Digital Ultrastar DC HC320 Enterprise SATA 6Gb/s (SATA III) 8 TB
ST8000NM017B-2TJ103 Seagate EXOS 7E10 Enterprise SATA 6Gb/s (SATA III) 8 TB
WD8004FRYZ Western Digital Gold Enterprise SATA 6Gb/s (SATA III) 8 TB
WD8004VRYZ Western Digital Surveillance Gold Enterprise SATA 6Gb/s (SATA III) 8 TB
ST6000NM019B-2TG103 Seagate EXOS 7E10 Enterprise SATA 6Gb/s (SATA III) 6 TB
ST4000NM024B-2TF103 Seagate EXOS 7E10 Enterprise SATA 6Gb/s (SATA III) 4 TB
ST2000NM017B-2TD103 Seagate EXOS 7E10 Enterprise SATA 6Gb/s (SATA III) 2 TB

Going big on the TS-h665U?

At the top of the capacity range only enterprise lines are listed. They are built for sustained 7200RPM writes and 24/7 RAID duty — the right choice for a full-bay build:

Security: QNAP security: DeadBolt history & lockdown — eCh0raix → Qlocker → DeadBolt — what changed.