NAS Drive Compatibility

Compatible hard drives for Synology DS420j

238 drives are on Synology's official compatibility list for the DS420j. Read from synology.com, refreshed daily by CI.

238
Listed drives
186
NAS / Plus line
1
Enterprise line
20 TB
Largest listed drive

Capacity range on the official list

20TB (1)16TB (5)14TB (18)12TB (18)10TB (27)8TB (49)7TB (1) … 7TB & below (119)

Where to start on the DS420j

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

Full DS420j compatibility list

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

DriveBrandSeriesLineTypeMax listed
HAT3320-20T Synology HAT3320 Plus 3.5" SATA HDD 20 TB
HAT3310-16T Synology HAT3310 Plus 3.5" SATA HDD 16 TB
ST16000NE000 - 2RW103 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 16 TB
ST16000VE000 Seagate SkyHawkAI Surveillance 3.5" SATA HDD 16 TB
ST16000VN001 - 2RV103 Seagate IronWolf NAS 3.5" SATA HDD 16 TB
ST16000VN001 - 2YU101 Seagate IronWolf NAS 3.5" SATA HDD 16 TB
HDWG21EAZSTA Toshiba N300 NAS 3.5" SATA HDD 14 TB
HDWG21EEZSTA Toshiba N300 NAS 3.5" SATA HDD 14 TB
HDWG21EUZSVA Toshiba N300 NAS 3.5" SATA HDD 14 TB
HDWG21EXZSTA Toshiba N300 NAS 3.5" SATA HDD 14 TB
HDWG21EYZSTA Toshiba N300 NAS 3.5" SATA HDD 14 TB
MN07ACA14T Toshiba MN07ACA*** NAS 3.5" SATA HDD 14 TB
ST14000NE0008 - 2JK101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 14 TB
ST14000NE0008 - 2RX103 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 14 TB
ST14000VE0008 Seagate SkyHawkAI Surveillance 3.5" SATA HDD 14 TB
ST14000VN0008 - 2KU103 Seagate IronWolf NAS 3.5" SATA HDD 14 TB
ST14000VN0008 - 2YT101 Seagate IronWolf NAS 3.5" SATA HDD 14 TB
WD140EFFX - 68VBXN0 Western Digital Red NAS 3.5" SATA HDD 14 TB
WD140EFGX - 68B0GN0 Western Digital Red Plus NAS 3.5" SATA HDD 14 TB
WD140EJRX Western Digital Purple Surveillance 3.5" SATA HDD 14 TB
WD140EVRX Western Digital Purple Surveillance 3.5" SATA HDD 14 TB
WD140PURX Western Digital Purple Surveillance 3.5" SATA HDD 14 TB
WD140PURZ - 85GG1Y0 Western Digital Purple Surveillance 3.5" SATA HDD 14 TB
WD141KFGX Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 14 TB
HAT3300-12T Synology HAT3300 Plus 3.5" SATA HDD 12 TB
HAT3310-12T Synology HAT3310 Plus 3.5" SATA HDD 12 TB
HDWG21CAZSTA Toshiba N300 NAS 3.5" SATA HDD 12 TB
HDWG21CEZSTA Toshiba N300 NAS 3.5" SATA HDD 12 TB
HDWG21CUZSVA Toshiba N300 NAS 3.5" SATA HDD 12 TB
HDWG21CXZSTA Toshiba N300 NAS 3.5" SATA HDD 12 TB
HDWG21CYZSTA Toshiba N300 NAS 3.5" SATA HDD 12 TB
MN07ACA12T Toshiba MN07ACA*** NAS 3.5" SATA HDD 12 TB
ST12000NE0007 - 2GT116 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 12 TB
ST12000NE0008 - 2JL101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 12 TB
ST12000NE0008 - 2PK103 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 12 TB
ST12000VE0008 Seagate SkyHawkAI Surveillance 3.5" SATA HDD 12 TB
ST12000VN0007 - 2GS116 Seagate IronWolf NAS 3.5" SATA HDD 12 TB
ST12000VN0008 - 2PH103 Seagate IronWolf NAS 3.5" SATA HDD 12 TB
ST12000VN0008 - 2YS101 Seagate IronWolf NAS 3.5" SATA HDD 12 TB
WD120EFAX - 68UNTN0 Western Digital Red NAS 3.5" SATA HDD 12 TB
WD120EFBX - 68B0EN0 Western Digital Red Plus NAS 3.5" SATA HDD 12 TB
WD121KFBX Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 12 TB
HDN721010ALE604 Western Digital Deskstar NAS 3.5" SATA HDD 10 TB
HDWG11AAZSTA Toshiba N300 NAS 3.5" SATA HDD 10 TB
HDWG11AEZSTA Toshiba N300 NAS 3.5" SATA HDD 10 TB
HDWG11AUZSVA Toshiba N300 NAS 3.5" SATA HDD 10 TB
HDWG11AXZSTA Toshiba N300 NAS 3.5" SATA HDD 10 TB
HDWG11AYZSTA Toshiba N300 NAS 3.5" SATA HDD 10 TB
HDWT31AUZSVA Toshiba MD06ACA***V Surveillance 3.5" SATA HDD 10 TB
MD06ACA10TV Toshiba MD06ACA***V Surveillance 3.5" SATA HDD 10 TB
MN06ACA10T Toshiba MN06ACA*** NAS 3.5" SATA HDD 10 TB
ST10000NE0004 - 1ZF101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 10 TB
ST10000NE0004 - 2GT11L Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 10 TB
ST10000NE0008 - 2JM101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 10 TB
ST10000NE0008 - 2PL103 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 10 TB
ST10000VE0008 Seagate SkyHawkAI Surveillance 3.5" SATA HDD 10 TB
ST10000VN000 - 3AK101 Seagate IronWolf NAS 3.5" SATA HDD 10 TB
ST10000VN0004 - 1ZD101 Seagate IronWolf NAS 3.5" SATA HDD 10 TB
ST10000VN0004 - 2GS11L Seagate IronWolf NAS 3.5" SATA HDD 10 TB
ST10000VN0008 - 2PJ103 Seagate IronWolf NAS 3.5" SATA HDD 10 TB
ST10000VX0004 - 1ZE101 Seagate SkyHawk Surveillance 3.5" SATA HDD 10 TB
WD100EFAX - 68LHPN0 Western Digital Red NAS 3.5" SATA HDD 10 TB
WD100PURZ - 85W86Y0 Western Digital Purple Surveillance 3.5" SATA HDD 10 TB
WD101EFAX - 68LDBN0 Western Digital Red NAS 3.5" SATA HDD 10 TB
WD101EFBX - 68B0AN0 Western Digital Red Plus NAS 3.5" SATA HDD 10 TB
WD101KFBX - 68R56N0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 10 TB
WD101PURZ - 85C62Y0 Western Digital Purple Surveillance 3.5" SATA HDD 10 TB
WD102KFBX - 68M95N0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 10 TB
WD102PURZ - 85BXPY0 Western Digital Purple Surveillance 3.5" SATA HDD 10 TB
HAT3300-8T Synology HAT3300 Plus 3.5" SATA HDD 8 TB
HAT3310-8T Synology HAT3310 Plus 3.5" SATA HDD 8 TB
HAT3320-8T Synology HAT3320 Plus 3.5" SATA HDD 8 TB
HDWG180AZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG180EZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG180UZSVA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG180XZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG180YZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG480AZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG480EZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG480UZSVA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG480XZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWG480YZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWN180AZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWN180EZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWN180UZSVA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWN180XZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWN180YZSTA Toshiba N300 NAS 3.5" SATA HDD 8 TB
HDWT380UZSVA Toshiba MD06ACA***V Surveillance 3.5" SATA HDD 8 TB
MD06ACA800V Toshiba MD06ACA***V Surveillance 3.5" SATA HDD 8 TB
MG05ACA800E Toshiba MG05ACA**** Enterprise 3.5" SATA HDD 8 TB
MN05ACA800 Toshiba MN05ACA*** NAS 3.5" SATA HDD 8 TB
MN06ACA800 Toshiba MN06ACA*** NAS 3.5" SATA HDD 8 TB
MN08ADA800 Toshiba MN08AD NAS 3.5" SATA HDD 8 TB
ST8000NE0001 - 1WN112 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 8 TB
ST8000NE0004 - 1ZF11G Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 8 TB
ST8000NE0008 - 2JN101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 8 TB
ST8000NE001 - 2M7101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 8 TB
ST8000NE0021 - 2EN112 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 8 TB
ST8000VN0002 - 1Z8112 Seagate NAS HDD NAS 3.5" SATA HDD 8 TB
ST8000VN002 - 2ZM188 Seagate IronWolf NAS 3.5" SATA HDD 8 TB
ST8000VN0022 - 2EL112 Seagate IronWolf NAS 3.5" SATA HDD 8 TB
ST8000VN004 - 2M2101 Seagate IronWolf NAS 3.5" SATA HDD 8 TB
ST8000VN004 - 3CP101 Seagate IronWolf NAS 3.5" SATA HDD 8 TB
ST8000VX0002 - 1Z6112 Seagate SkyHawk Surveillance 3.5" SATA HDD 8 TB
ST8000VX0022 - 2EJ112 Seagate SkyHawk Surveillance 3.5" SATA HDD 8 TB
ST8000VX004 - 2M1101 Seagate SkyHawk Surveillance 3.5" SATA HDD 8 TB
WD8003FFBX - 68B9AN0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 8 TB
WD80EFAX - 68KNBN0 Western Digital Red NAS 3.5" SATA HDD 8 TB
WD80EFBX - 68AZZN0 Western Digital Red Plus NAS 3.5" SATA HDD 8 TB
WD80EFPX - 68C4ZN0 Western Digital Red Plus NAS 3.5" SATA HDD 8 TB
WD80EFZX - 68B3CN0 Western Digital Red Plus NAS 3.5" SATA HDD 8 TB
WD80EFZZ - 68BTXN0 Western Digital Red Plus NAS 3.5" SATA HDD 8 TB
WD82EJRX - 89AD9Y0 Western Digital Purple Surveillance 3.5" SATA HDD 8 TB
WD82EVRX - 52DZFY0 Western Digital Purple Surveillance 3.5" SATA HDD 8 TB
WD82PURX - 64GVLYO Western Digital Purple Surveillance 3.5" SATA HDD 8 TB
WD82PURX - 69GVLY0 Western Digital Purple Surveillance 3.5" SATA HDD 8 TB
WD82PURX - 78GVLY0 Western Digital Purple Surveillance 3.5" SATA HDD 8 TB
WD82PURZ - 85TEUY0 Western Digital Purple Surveillance 3.5" SATA HDD 8 TB
ST7000VN0002 - 2EL11B Seagate IronWolf NAS 3.5" SATA HDD 7 TB
HAT3300-6T Synology HAT3300 Plus 3.5" SATA HDD 6 TB
HDWG160AZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG160EZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG160UZSVA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG160XZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG160YZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG460AZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG460EZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG460UZSVA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG460XZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWG460YZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWN160AZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWN160UZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWN160UZSVA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWN160XZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWN160YZSTA Toshiba N300 NAS 3.5" SATA HDD 6 TB
HDWT360UZSVA Toshiba MD06ACA***V Surveillance 3.5" SATA HDD 6 TB
MD06ACA600V Toshiba MD06ACA***V Surveillance 3.5" SATA HDD 6 TB
MN06ACA600 Toshiba MN06ACA*** NAS 3.5" SATA HDD 6 TB
MN08ADA600 Toshiba MN08AD NAS 3.5" SATA HDD 6 TB
ST6000NE000 - 2KR101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 6 TB
ST6000NE0001 - 1WN11C Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 6 TB
ST6000NE0003 - 1ZM110 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 6 TB
ST6000NE0021 - 2EN11C Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 6 TB
ST6000NE0023 - 2EX110 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 6 TB
ST6000VN001 - 2BB186 Seagate IronWolf NAS 3.5" SATA HDD 6 TB
ST6000VN0021 - 1ZA17Z Seagate NAS HDD NAS 3.5" SATA HDD 6 TB
ST6000VN0033 - 2EE110 Seagate IronWolf NAS 3.5" SATA HDD 6 TB
ST6000VN0041 - 2EL11C Seagate IronWolf NAS 3.5" SATA HDD 6 TB
ST6000VN006 - 2ZM186 Seagate IronWolf NAS 3.5" SATA HDD 6 TB
WD6001FFWX - 68Z39N0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 6 TB
WD6003FFBX - 68MU3N0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 6 TB
WD60EFPX - 68C5ZN0 Western Digital Red Plus NAS 3.5" SATA HDD 6 TB
WD60EFRX - 68L0BN1 Western Digital Red NAS 3.5" SATA HDD 6 TB
WD60EFZX - 68B3FN0 Western Digital Red Plus NAS 3.5" SATA HDD 6 TB
WD60EJRX Western Digital Purple Surveillance 3.5" SATA HDD 6 TB
WD60PURX - 64T0ZY0 Western Digital Purple Surveillance 3.5" SATA HDD 6 TB
WD60PURZ - 85ZUFY1 Western Digital Purple Surveillance 3.5" SATA HDD 6 TB
WD6NPURX - 64JC5Y0 Western Digital Purple NV Surveillance 3.5" SATA HDD 6 TB
H3IKNAS500012872SA (0S03837) Western Digital Deskstar NAS NAS 3.5" SATA HDD 5 TB
H3IKNAS500012872SE (0S03836) Western Digital Deskstar NAS NAS 3.5" SATA HDD 5 TB
H3IKNAS500012872SJ (0S03838) Western Digital Deskstar NAS NAS 3.5" SATA HDD 5 TB
WD5001FFWX - 68Z39N0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 5 TB
WD50EFRX - 68L0BN1 Western Digital Red NAS 3.5" SATA HDD 5 TB
HAT3300-4T Synology HAT3300 Plus 3.5" SATA HDD 4 TB
HDWG440AZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWG440EZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWG440UZSVA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWG440XZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWG440YZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWQ140AZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWQ140EZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWQ140UZSVA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWQ140XZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWQ140YZSTA Toshiba N300 NAS 3.5" SATA HDD 4 TB
HDWT140UZSVA Toshiba S300 Surveillance 3.5" SATA HDD 4 TB
MD04ABA400V Toshiba MD04ABAxxxV Surveillance 3.5" SATA HDD 4 TB
MN08ADA400E Toshiba MN08AD NAS 3.5" SATA HDD 4 TB
ST4000NE001 - 2MA101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 4 TB
ST4000NE0015 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 4 TB
ST4000NE0025 - 2EW107 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 4 TB
ST4000VN000 - 1H4168 Seagate NAS HDD NAS 3.5" SATA HDD 4 TB
ST4000VN000 - 2AH166 Seagate NAS HDD NAS 3.5" SATA HDD 4 TB
ST4000VN0001 - 1SF178 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 4 TB
ST4000VN0011 - 1UL178 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 4 TB
ST4000VN003 - 1T5168 Seagate NAS HDD (+Rescue) NAS 3.5" SATA HDD 4 TB
ST4000VN006 - 3CW104 Seagate IronWolf NAS 3.5" SATA HDD 4 TB
ST4000VN008 - 2DR166 Seagate IronWolf NAS 3.5" SATA HDD 4 TB
ST4000VX000 - 2AG166 Seagate Surveillance Surveillance 3.5" SATA HDD 4 TB
ST4000VX007 - 2DT166 Seagate SkyHawk Surveillance 3.5" SATA HDD 4 TB
WD4003FFBX Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 4 TB
WD40EFPX - 68C6CN0 Western Digital Red Plus NAS 3.5" SATA HDD 4 TB
WD40EFRX - 68N32N0 Western Digital Red NAS 3.5" SATA HDD 4 TB
WD40EFZX - 68AWUN0 Western Digital Red Plus NAS 3.5" SATA HDD 4 TB
WD40EJRX Western Digital Purple Surveillance 3.5" SATA HDD 4 TB
WD40PURX - 64GVNY0 Western Digital Purple Surveillance 3.5" SATA HDD 4 TB
WD40PURZ Western Digital Purple Surveillance 3.5" SATA HDD 4 TB
WD4NPURX - 64TPFY0 Western Digital Purple NV Surveillance 3.5" SATA HDD 4 TB
ST3000VN000 - 1H4167 Seagate NAS HDD NAS 3.5" SATA HDD 3 TB
ST3000VN000 - 1HJ166 Seagate NAS HDD NAS 3.5" SATA HDD 3 TB
ST3000VN0001 - 1SF176 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 3 TB
ST3000VN0011 - 1UL176 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 3 TB
ST3000VN006 - 3CW10G Seagate IronWolf NAS 3.5" SATA HDD 3 TB
ST3000VN007 - 2AH16M Seagate IronWolf NAS 3.5" SATA HDD 3 TB
ST3000VN007 - 2E4166 Seagate IronWolf NAS 3.5" SATA HDD 3 TB
ST3000VX006 - 1HH166 Seagate Surveillance HDD Surveillance 3.5" SATA HDD 3 TB
ST3000VX010 - 2E3166 Seagate SkyHawk Surveillance 3.5" SATA HDD 3 TB
WD30EFPX - 68C6CN0 Western Digital Red Plus NAS 3.5" SATA HDD 3 TB
WD30EFRX - 68EUZN0 Western Digital Red NAS 3.5" SATA HDD 3 TB
WD30EFRX - 68N32N0 Western Digital Red NAS 3.5" SATA HDD 3 TB
WD30EFZX - 68AWUN0 Western Digital Red Plus NAS 3.5" SATA HDD 3 TB
WD30EJRX Western Digital Purple Surveillance 3.5" SATA HDD 3 TB
WD30PURX Western Digital Purple Surveillance 3.5" SATA HDD 3 TB
WD30PURZ Western Digital Purple Surveillance 3.5" SATA HDD 3 TB
HAT3300-2T Synology HAT3300 Plus 3.5" SATA HDD 2 TB
ST2000NE001 - 2M5101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 2 TB
ST2000NE0015 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 2 TB
ST2000NE0025 - 2FL101 Seagate IronWolf Pro Enterprise NAS 3.5" SATA HDD 2 TB
ST2000VN000 - 1H3164 Seagate NAS HDD NAS 3.5" SATA HDD 2 TB
ST2000VN0001 - 1SF174 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 2 TB
ST2000VN0011 - 1UL174 Seagate Enterprise NAS HDD Enterprise NAS 3.5" SATA HDD 2 TB
ST2000VN003 - 3CW102 Seagate IronWolf NAS 3.5" SATA HDD 2 TB
ST2000VN004 - 2E4164 Seagate IronWolf NAS 3.5" SATA HDD 2 TB
ST2000VX008 - 2E3164 Seagate SkyHawk Surveillance 3.5" SATA HDD 2 TB
WD2002FFSX - 68PF8N0 Western Digital Red Pro Enterprise NAS 3.5" SATA HDD 2 TB
WD20EFPX - 68C4TN0 Western Digital Red Plus NAS 3.5" SATA HDD 2 TB
WD20EFRX Western Digital Red NAS 3.5" SATA HDD 2 TB
WD20EFZX - 68AWUN0 Western Digital Red Plus NAS 3.5" SATA HDD 2 TB
WD20EJRX Western Digital Purple Surveillance 3.5" SATA HDD 2 TB
WD20PURX Western Digital Purple Surveillance 3.5" SATA HDD 2 TB
WD20PURZ Western Digital Purple Surveillance 3.5" SATA HDD 2 TB
ST1000VN000-1HJ162 Seagate NAS HDD NAS 3.5" SATA HDD 1 TB
ST1000VN001 - 1T4162 Seagate NAS HDD (+Rescue) NAS 3.5" SATA HDD 1 TB
ST1000VN002 - 2EY102 Seagate IronWolf NAS 3.5" SATA HDD 1 TB
ST1000VN008 - 3CW10C Seagate IronWolf NAS 3.5" SATA HDD 1 TB
ST1000VX001 - 1Z4102 Seagate Surveillance HDD Surveillance 3.5" SATA HDD 1 TB
ST1000VX005 - 2E3162 Seagate SkyHawk Surveillance 3.5" SATA HDD 1 TB
ST1000VX005 - 2EX102 Seagate SkyHawk Surveillance 3.5" SATA HDD 1 TB
WD10EFRX Western Digital Red NAS 3.5" SATA HDD 1 TB

Going big on the DS420j?

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: