Parts Library / Storage / WD Red Pro 22TB WD221KFGX WD Red Pro 22TB WD221KFGX
Brand WD
Model WD Red Pro 22TB WD221KFGX $903–$998 estimated range · from catalog price Oct 21, 2026
WD Red Pro 22TB (WD221KFGX) launched July 19, 2022: a 7200 RPM NAS HDD for 24x7 multi-user arrays with SATA 6Gb/s, 512MB cache and 550TB/yr workload rating.
Storage performance rank Top 66% of storage drives Tier Workstation ?GixCore tier What a part was built to do — not what it costs. Entry Budget Mainstream High end Enthusiast Flagship Workstation Workstation parts sit outside that ladder — built for sustained professional workloads rather than a price-for-performance rung. A part can be cheap because it is an ageing flagship, or because it is a current entry-level model. The tier tells you which.
Released Jul 2022
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Capacity 22 TB
Type HDD
Interface SATA
Read speed 272 MB/s
Write speed 272 MB/s
Form factor 3.5"
↳ Find a match 73 compatible motherboards → ⇄ With nearby tiers Compare → + Test compatibility Check it in your build → C GixCore Editorial
Product overview Introduced July 19, 2022, the WD Red Pro 22TB (WD221KFGX) extends Western Digital’s Red Pro NAS HDD family to its then‑top capacity. It’s a 3.5-inch, SATA 6 Gb/s, 7200‑RPM CMR drive with a 512MB cache, tuned for 24x7 multi‑user NAS duty and RAID arrays.
Positioned in our workstation/enterprise tier, it exists to pack maximum capacity and reliability into large‑bay NAS systems, backed by a 550TB/year workload rating, TLER and vibration safeguards. It’s best used as mass storage for file shares, backups and big media libraries. Unique note: this model adds WD’s OptiNAND and ArmorCache technologies to protect data during cached writes. Not discontinued as of October 2026.
Official product specifications ↗ Pairing fit
Compatible Motherboards Compatible options ranked for this part's performance class.
Specifications + Add to compare At a glance iEach dot represents a catalog model. Farther right means a higher measured value, not necessarily a better fit. Measured against the storage drives catalog
Capacity 22 TB
Gold S31 500GB Capacity: 500 GB 870 EVO Capacity: 1 TB BX500 Capacity: 1 TB Extreme M.2 NVMe SSD 1TB Capacity: 1 TB GAMMIX S70 Blade Capacity: 1 TB Gold P31 1TB Capacity: 1 TB P2 Capacity: 1 TB P310 1TB SSD Capacity: 1 TB WD Blue SA510 SATA Capacity: 1 TB WD_BLACK Capacity: 1 TB MP600 PRO LPX Capacity: 2 TB 2TB NVMe M.2 PCIe Gen3x4 Capacity: 2 TB 870 EVO Capacity: 2 TB 870 QVO Capacity: 2 TB 9100 PRO 2TB Capacity: 2 TB 990 EVO Plus 2TB Capacity: 2 TB 990 PRO 2TB Capacity: 2 TB BarraCuda 2TB Capacity: 2 TB Crucial T700 PCIe Gen5 NVMe 2TB SSD Capacity: 2 TB KC3000 2TB Capacity: 2 TB LEGEND 960 MAX Capacity: 2 TB MP700 Elite 2TB Capacity: 2 TB MX500 Capacity: 2 TB NM790 Capacity: 2 TB NV3 2TB M.2 2280 NVMe SSD Capacity: 2 TB P410 2TB Capacity: 2 TB QN322 2TB Capacity: 2 TB SFYRDK/2000G Capacity: 2 TB T-FORCE A440 Aluminum Heatsink 2TB Capacity: 2 TB T710 Capacity: 2 TB WD Black Capacity: 2 TB WD_BLACK 2TB SN770 Capacity: 2 TB 4TB WD Black Capacity: 4 TB 870 EVO Capacity: 4 TB 990 PRO 4TB Capacity: 4 TB MX500 Capacity: 4 TB Performance Plus Capacity: 4 TB Skyhawk 4TB Capacity: 4 TB Ultra 3D NAND Capacity: 4 TB WD_BLACK SN850X 4TB Capacity: 4 TB IronWolf 6TB NAS Capacity: 6 TB WD Blue 6 TB Capacity: 6 TB IronWolf 8TB Capacity: 8 TB 870 QVO Capacity: 8 TB 8TB WD Red Plus Capacity: 8 TB BarraCuda 8TB Capacity: 8 TB WD BLACK 8TB Capacity: 8 TB 10TB WD Purple Pro Capacity: 10 TB 10TB WD Red Plus Capacity: 10 TB IronWolf 10TB NAS Capacity: 10 TB 12TB WD Purple Pro Capacity: 12 TB IronWolf 12TB Capacity: 12 TB Ultrastar DC HC530 Capacity: 14 TB IronWolf 16TB Capacity: 16 TB WD Purple Pro Surveillance HDD Capacity: 18 TB WD Red Pro NAS Capacity: 18 TB WD Red Pro NAS Capacity: 20 TB WD Red Pro 22TB WD221KFGX Capacity: 22 TB This part
500 GB 22 TB
Higher than 98% of storage drives Read speed 272 MB/s
WD Black Read speed: 164 MB/s WD Blue 6 TB Read speed: 180 MB/s 8TB WD Red Plus Read speed: 185 MB/s BarraCuda 8TB Read speed: 190 MB/s IronWolf 6TB NAS Read speed: 190 MB/s Skyhawk 4TB Read speed: 190 MB/s 4TB WD Black Read speed: 202 MB/s IronWolf 8TB Read speed: 210 MB/s IronWolf 10TB NAS Read speed: 210 MB/s IronWolf 12TB Read speed: 210 MB/s IronWolf 16TB Read speed: 210 MB/s 10TB WD Red Plus Read speed: 215 MB/s BarraCuda 2TB Read speed: 220 MB/s WD BLACK 8TB Read speed: 238 MB/s 12TB WD Purple Pro Read speed: 245 MB/s 10TB WD Purple Pro Read speed: 265 MB/s Ultrastar DC HC530 Read speed: 267 MB/s WD Red Pro NAS Read speed: 268 MB/s WD Purple Pro Surveillance HDD Read speed: 272 MB/s WD Red Pro 22TB WD221KFGX Read speed: 272 MB/s This part WD Red Pro NAS Read speed: 272 MB/s BX500 Read speed: 540 MB/s 870 EVO Read speed: 560 MB/s 870 EVO Read speed: 560 MB/s 870 EVO Read speed: 560 MB/s 870 QVO Read speed: 560 MB/s 870 QVO Read speed: 560 MB/s Gold S31 500GB Read speed: 560 MB/s MX500 Read speed: 560 MB/s MX500 Read speed: 560 MB/s Ultra 3D NAND Read speed: 560 MB/s WD Blue SA510 SATA Read speed: 560 MB/s 2TB NVMe M.2 PCIe Gen3x4 Read speed: 2200 MB/s QN322 2TB Read speed: 2300 MB/s P2 Read speed: 2400 MB/s Gold P31 1TB Read speed: 3500 MB/s P410 2TB Read speed: 5000 MB/s Extreme M.2 NVMe SSD 1TB Read speed: 5150 MB/s WD_BLACK Read speed: 5150 MB/s WD_BLACK 2TB SN770 Read speed: 5150 MB/s NV3 2TB M.2 2280 NVMe SSD Read speed: 6000 MB/s KC3000 2TB Read speed: 7000 MB/s T-FORCE A440 Aluminum Heatsink 2TB Read speed: 7000 MB/s MP600 PRO LPX Read speed: 7100 MB/s P310 1TB SSD Read speed: 7100 MB/s Performance Plus Read speed: 7200 MB/s 990 EVO Plus 2TB Read speed: 7250 MB/s SFYRDK/2000G Read speed: 7300 MB/s WD_BLACK SN850X 4TB Read speed: 7300 MB/s GAMMIX S70 Blade Read speed: 7400 MB/s LEGEND 960 MAX Read speed: 7400 MB/s NM790 Read speed: 7400 MB/s 990 PRO 2TB Read speed: 7450 MB/s 990 PRO 4TB Read speed: 7450 MB/s MP700 Elite 2TB Read speed: 10000 MB/s Crucial T700 PCIe Gen5 NVMe 2TB SSD Read speed: 12400 MB/s 9100 PRO 2TB Read speed: 14700 MB/s T710 Read speed: 14900 MB/s
164 MB/s 14900 MB/s
Higher than 34% of storage drives Write speed 272 MB/s
WD Black Write speed: 164 MB/s WD Blue 6 TB Write speed: 180 MB/s 8TB WD Red Plus Write speed: 185 MB/s BarraCuda 8TB Write speed: 190 MB/s IronWolf 6TB NAS Write speed: 190 MB/s Skyhawk 4TB Write speed: 190 MB/s 4TB WD Black Write speed: 202 MB/s IronWolf 8TB Write speed: 210 MB/s IronWolf 10TB NAS Write speed: 210 MB/s IronWolf 12TB Write speed: 210 MB/s IronWolf 16TB Write speed: 210 MB/s 10TB WD Red Plus Write speed: 215 MB/s BarraCuda 2TB Write speed: 220 MB/s WD BLACK 8TB Write speed: 238 MB/s 12TB WD Purple Pro Write speed: 245 MB/s 10TB WD Purple Pro Write speed: 265 MB/s Ultrastar DC HC530 Write speed: 267 MB/s WD Red Pro NAS Write speed: 268 MB/s WD Purple Pro Surveillance HDD Write speed: 272 MB/s WD Red Pro 22TB WD221KFGX Write speed: 272 MB/s This part WD Red Pro NAS Write speed: 272 MB/s BX500 Write speed: 500 MB/s MX500 Write speed: 510 MB/s MX500 Write speed: 510 MB/s WD Blue SA510 SATA Write speed: 520 MB/s Gold S31 500GB Write speed: 525 MB/s 870 EVO Write speed: 530 MB/s 870 EVO Write speed: 530 MB/s 870 EVO Write speed: 530 MB/s 870 QVO Write speed: 530 MB/s 870 QVO Write speed: 530 MB/s Ultra 3D NAND Write speed: 530 MB/s 2TB NVMe M.2 PCIe Gen3x4 Write speed: 1600 MB/s P2 Write speed: 1800 MB/s QN322 2TB Write speed: 1800 MB/s Gold P31 1TB Write speed: 3200 MB/s P410 2TB Write speed: 4500 MB/s WD_BLACK 2TB SN770 Write speed: 4850 MB/s Extreme M.2 NVMe SSD 1TB Write speed: 4900 MB/s WD_BLACK Write speed: 4900 MB/s NV3 2TB M.2 2280 NVMe SSD Write speed: 5000 MB/s GAMMIX S70 Blade Write speed: 5500 MB/s P310 1TB SSD Write speed: 6000 MB/s 990 EVO Plus 2TB Write speed: 6300 MB/s WD_BLACK SN850X 4TB Write speed: 6300 MB/s NM790 Write speed: 6500 MB/s MP600 PRO LPX Write speed: 6800 MB/s LEGEND 960 MAX Write speed: 6800 MB/s Performance Plus Write speed: 6800 MB/s 990 PRO 2TB Write speed: 6900 MB/s 990 PRO 4TB Write speed: 6900 MB/s T-FORCE A440 Aluminum Heatsink 2TB Write speed: 6900 MB/s KC3000 2TB Write speed: 7000 MB/s SFYRDK/2000G Write speed: 7000 MB/s MP700 Elite 2TB Write speed: 8500 MB/s Crucial T700 PCIe Gen5 NVMe 2TB SSD Write speed: 11800 MB/s 9100 PRO 2TB Write speed: 13400 MB/s T710 Write speed: 13800 MB/s
164 MB/s 13800 MB/s
Higher than 34% of storage drives
Capacity 22 TB
Type HDD
Read speed 272 MB/s
Write speed 272 MB/s
Form factor 3.5"
Hardware Interface SATA III 6 Gb/s
Data Transfer Rate 6000 Mb/s
Interface SATA
Tdp 8 W 
