








💼 Elevate your data game with WD Red Plus — where reliability meets relentless performance.
The Western Digital 4TB WD Red Plus NAS Internal Hard Drive (WD40EFPX) is a 3.5-inch mechanical HDD designed specifically for NAS environments. Featuring a 5400 RPM rotational speed, SATA 6 Gb/s interface, and 256 MB cache, it supports up to 8-bay systems and an annual workload rate of 180 TB. Its NASware firmware ensures compatibility and reliability for continuous, heavy-duty data operations.




| Brand | Western Digital |
| Product Dimensions | 14.71 x 10.16 x 2.61 cm; 570 g |
| Item model number | WD40EFPX |
| Manufacturer | Western Digital |
| Series | Red Plus |
| Color | Red |
| Form Factor | 3.5-inch |
| Hard Drive Size | 4 TB |
| Hard Disk Description | Mechanical Hard Disk |
| Hard Drive Interface | Serial ATA-600 |
| Hard Disk Rotational Speed | 5400 RPM |
| Voltage | 1 Volts |
| Hardware Platform | x86_64 |
| Are Batteries Included | No |
| Lithium Battery Packaging | Batteries only |
| Lithium Battery Weight | 0.19 Grams |
| Number Of Lithium Ion Cells | 1 |
| Number of Lithium Metal Cells | 1 |
| Item Weight | 570 g |
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