Western Digital · NAS
WD161KFGX
WD Red Pro 16TB
SATA 6Gb/s · 3.5-inch · CMR
Exact Amazon US product
$704.99
View on Amazon US ↗New listing · ASIN B08K3VVKSW
Price as of Sep 12, 2026 10:57 UTC
The Western Digital WD161KFGX is a 16TB WD Red Pro hard drive for NAS storage, using SATA 6Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | WD161KFGX |
|---|---|
| Nominal capacity | 16 TB · 16000 GB |
| RPM | 7200 |
| Interface | SATA 6Gb/s |
| Recording | CMR |
| Cache (MB) | 512 |
| Form factor | 3.5-inch |
| Workload rating (TB/year) | 550 |
| Physical sector size (bytes) | 4096 |
| Manufacturer limited warranty | 5 years (eligible new drives) |
| Sustained transfer (up to MB/s) | 259 |
Source: Western Digital WD Red Pro manufacturer datasheet. Reviewed 2026-08-21. Published specifications, not our benchmark results.
What the specifications mean
- CMR recording is specified for this exact model. Check enclosure support and workload limits before installing it in an array.
- Up to 259 MB/s sustained transfer, as specified by the manufacturer. This is not a measured game-loading or random-I/O result.
- 550 TB/year workload rating. This is a workload limit, not a promise of drive lifespan or a backup guarantee.
Before ordering
Match WD161KFGX, 16TB and SATA 6Gb/s against the selected offer. Check your system’s exact-model compatibility list and the seller’s warranty and return terms.
Amazon US listings
Exact model matches on Amazon.com. A verified ASIN identifies the product; it does not guarantee current stock. Check the selected variant, condition and seller.
Amazon US · ASIN B08K3VVKSW
$704.99 · as of Sep 12, 2026 10:57 UTC
Amazon US · ASIN B08K3VVKSW
$589.99 · as of Sep 12, 2026 10:57 UTC
Same-capacity alternatives with Amazon US links
These models share the drive type, interface class and capacity. Compare their specifications and your system requirements before choosing a replacement.
Seagate · IronWolf Pro
ST16000NE000
16TB · SATA 6 Gb/s · CMR
Compare with WD161KFGX →View on Amazon US ↗ASIN B07SJTST6T · Check price and conditionSeagate · IronWolf Pro
ST16000NT001
16TB · SATA 6 Gb/s · CMR
Compare with WD161KFGX →View on Amazon US ↗ASIN B0B94PNF7P · Check price and conditionSeagate · IronWolf Pro
ST16000NTZ01
16TB · SATA 6 Gb/s · CMR
Compare with WD161KFGX →View on Amazon US ↗ASIN B0B94NFYWX · Check price and conditionWD161KFGX questions answered
Is WD161KFGX CMR or SMR?
The manufacturer lists CMR recording for WD161KFGX. Other models and capacities in the same family can differ.
What connection does WD161KFGX need?
WD161KFGX uses SATA 6Gb/s and a 3.5-inch form factor. Match both with the computer, controller or enclosure. An M.2 slot, 2.5-inch bay and 3.5-inch bay are not interchangeable.
How much usable space does WD161KFGX provide?
Its nominal capacity is 16000 GB, approximately 14901.2 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for WD161KFGX?
Manufacturer specification: 5 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.