Compatible hard drives for QNAP TS-409U
118 drives are on QNAP's official compatibility list for the TS-409U, up to 1TB listed. Read from qnap.com, list refreshed 2026-11-03.
4-bay Legacy model
118
Listed drives
0
NAS line
17
Enterprise line
101
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
1TB (11) 750GB (14) 640GB (2) 500GB (21) 400GB (13) 320GB (16) 300GB (2) 0.3TB & below (39)
Full TS-409U compatibility list
Grouped by part number; Max shows the largest capacity QNAP lists. Filter by brand, line or capacity:
| Drive | Brand | Series | Line | Type | Max listed |
|---|---|---|---|---|---|
| HD103SI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HD103UI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HDS721010KLA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| HE103UJ | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 1 TB |
| SAMSUNG HD103UJ | Samsung | Consumer | Other | HDD | 1 TB |
| ST31000333AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000340AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000340NS | Seagate | Surveillance | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| ST31000528AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 1 TB |
| WD1000FYPS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| WD1002FBYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 1 TB |
| HDS721075KLA330 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| SAMSUNG HD753LJ | Samsung | Other | HDD | 750 GB | |
| ST3750330AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750330NS | Seagate | Surveillance | Enterprise | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750528AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750630AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750640AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750640NS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| ST3750840AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AYPS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 750 GB |
| WD7500AYYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 750 GB |
| WD7502ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 750 GB |
| WD6400AACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 640 GB |
| WD6400AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 640 GB |
| HD502HI | Samsung | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| HDP725050GLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| HDP725050GLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| HDT725050VLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| HDT725050VLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500320AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500320NS | Seagate | Surveillance | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500418AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500620AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500630AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500630NS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| ST3500830AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000AACS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000AAJS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000ABPS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| WD5000KS | Western Digital | Other | HDD | 500 GB | |
| WD5000YS | Western Digital | Other | HDD | 500 GB | |
| WD5001ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| WD5002ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 500 GB |
| HDP725040GLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| HDP725040GLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| HDT725040VLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| HDT725040VLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| ST3400620AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 400 GB |
| ST3400620NS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| ST3400820AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 400 GB |
| WD4000AAJS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| WD4000AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 400 GB |
| WD4000ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 400 GB |
| WD4000KS | Western Digital | Other | HDD | 400 GB | |
| WD4000YS | Western Digital | Other | HDD | 400 GB | |
| WD4001ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 400 GB |
| HDP725032GLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| HDP725032GLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| HDT725032VLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| HDT725032VLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| ST3320418AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 320 GB |
| ST3320613AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 320 GB |
| ST3320620AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 320 GB |
| ST3320620NS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| ST3320820AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 320 GB |
| WD3200AAJS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| WD3200AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 320 GB |
| WD3200JS | Western Digital | Other | HDD | 320 GB | |
| WD3200KS | Western Digital | Other | HDD | 320 GB | |
| WD3200YS | Western Digital | Other | HDD | 320 GB | |
| WD3201ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 320 GB |
| WD320ABYS | Western Digital | Other | HDD | 320 GB | |
| ST3300820AS | Seagate | Barracuda | Other | SATA 3Gb/s (SATA II) | 300 GB |
| WD3000JS | Western Digital | Other | HDD | 300 GB | |
| HDP725025GLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| HDT722525DLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| HDT725025VLA360 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| HDT725025VLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250310AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250310NS | Seagate | Surveillance | Surveillance | HDD | 250 GB |
| ST3250310SV | Seagate | Surveillance | Surveillance | HDD | 250 GB |
| ST3250318AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250410AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250620AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250620NS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250820AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 250 GB |
| ST3250820NS | Seagate | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| WD2500AAJS | Western Digital | Other | HDD | 250 GB | |
| WD2500AAKS | Western Digital | Consumer | Other | SATA 3Gb/s (SATA II) | 250 GB |
| WD2500JS | Western Digital | Other | HDD | 250 GB | |
| WD2500KS | Western Digital | Other | HDD | 250 GB | |
| WD2500YS | Western Digital | Other | HDD | 250 GB | |
| WD2502ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 250 GB |
| ST3200820AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 200 GB |
| WD2000JS | Western Digital | Other | HDD | 200 GB | |
| HDT722516DLA380 | Hitachi | Consumer | Other | SATA 3Gb/s (SATA II) | 160 GB |
| ST3160215AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 160 GB |
| ST3160318AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 160 GB |
| ST3160815AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 160 GB |
| WD1600AAJS | Western Digital | Other | HDD | 160 GB | |
| WD1600JS | Western Digital | Other | HDD | 160 GB | |
| WD1600YS | Western Digital | Other | HDD | 160 GB | |
| WD1601ABYS | Western Digital | Enterprise | Enterprise | SATA 3Gb/s (SATA II) | 160 GB |
| ST3120215AS | Seagate | Other | SATA 3Gb/s (SATA II) | 120 GB | |
| ST3120815AS | Seagate | Other | SATA 3Gb/s (SATA II) | 120 GB | |
| WD1200JS | Western Digital | Other | HDD | 120 GB | |
| ST380215AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 80 GB |
| ST380815AS | Seagate | Consumer BarraCuda | Other | SATA 3Gb/s (SATA II) | 80 GB |
| WD800AAJS | Western Digital | Other | HDD | 80 GB | |
| WD800JD | Western Digital | Other | HDD | 80 GB | |
| ST340215AS | Seagate | Other | SATA 3Gb/s (SATA II) | 40 GB | |
| ST340815AS | Seagate | Other | SATA 3Gb/s (SATA II) | 40 GB | |
| WD400JD | Western Digital | Other | HDD | 40 GB |
Security: QNAP security: DeadBolt history & lockdown — eCh0raix → Qlocker → DeadBolt — what changed.