Western Digital · NAS
WD120EFBX
WD Red Plus 12TB
SATA 6 Gb/s · 3.5-inch · CMR
Check your options
An exact Amazon listing has not been verified for this model yet.
Compare alternatives ↓As an Amazon Associate I earn from qualifying purchases.The Western Digital WD120EFBX is a 12TB WD Red Plus hard drive for NAS storage, using SATA 6 Gb/s in a 3.5-inch form factor.
Manufacturer specifications
| Model number | WD120EFBX |
|---|---|
| Nominal capacity | 12 TB · 12000 GB |
| RPM | 7200 |
| NAS bays | Up to 8 |
| Interface | SATA 6 Gb/s |
| Recording | CMR |
| Cache (MB) | 256 |
| Form factor | 3.5-inch |
| Workload rating (TB/year) | 180 |
| Manufacturer limited warranty | 3 years (eligible new drives) |
Source: WD Red Plus datasheet, September 2025, pages 2. Reviewed 2026-09-07. 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.
- 180 TB/year workload rating. This is a workload limit, not a promise of drive lifespan or a backup guarantee.
Before ordering
Match WD120EFBX, 12TB and SATA 6 Gb/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.
No verified exact-model ASIN is linked yet. This does not establish whether the model is currently available. Compare the alternatives below and check their listings.
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
ST12000VNZ008
12TB · SATA 6 Gb/s · CMR
Compare with WD120EFBX →View on Amazon US ↗ASIN B08147LZFD · Check price and conditionSeagate · IronWolf
ST12000VN0007
12TB · SATA 6 Gb/s
Compare with WD120EFBX →View on Amazon US ↗ASIN B075X181C5 · Check price and conditionSeagate · IronWolf Pro
ST12000NE0007
12TB · SATA 6 Gb/s
Compare with WD120EFBX →View on Amazon US ↗ASIN B075X23774 · Check price and conditionWD120EFBX questions answered
Is WD120EFBX CMR or SMR?
The manufacturer lists CMR recording for WD120EFBX. Other models and capacities in the same family can differ.
What connection does WD120EFBX need?
WD120EFBX uses SATA 6 Gb/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 WD120EFBX provide?
Its nominal capacity is 12000 GB, approximately 11175.9 GiB before formatting. The filesystem, reserved space and any RAID redundancy reduce usable capacity further.
What warranty is listed for WD120EFBX?
Manufacturer specification: 3 years (eligible new drives). A renewed, used, OEM or imported offer can have different coverage. Check the serial number and seller terms before buying.