| Product Name | WD 4TB Red 5400 rpm SATA III 3.5" Internal NAS Hard Disk Drive |
| Product Line | Red |
| Product Model | WD40EFRX |
| Product Type | Hard Drive |
| Technical Information | |
| Storage Capacity | 4 TB |
| Interfaces/Ports | |
| Drive Interface | SATA |
| Drive Interface Standard | SATA/600 |
| Drive Performance | |
| Spindle Speed (rpm) | 5400 |
| Buffer | 64 MB |
| Physical Characteristics | |
| Drive Type | Internal |
| Drive Width | 3.5" |
| Height | 1" |
| Width | 4" |
| Depth | 5.8" |
| Other Information | |
| Product Family | Red |
| Maximum External Data Transfer Rate | 768 MB/s (6 Gbit/s) |
| Features | IntelliPower |
