| Manufacturer: | WESTERN DIGITAL |
| Manufacturer Part No: | WDBFTM0040BSL-WESN |
| General |
| Device Type: | Hard drive - external (portable) |
| Capacity: | 4 TB |
| Hardware Encryption: | Yes |
| Encryption Algorithm: | 256-bit AES |
| Interface: | USB 3.0 |
| Features: | Password authentication, automatic backup, NTFS formatted |
| Width: | 81.6 mm |
| Depth: | 110 mm |
| Height: | 20.96 mm |
| Weight: | 230 g |
| Performance |
| Interface Transfer Rate: | 5.0 Gbps (USB 3.0) / 480 Mbps (USB 2.0) |
| Expansion & Connectivity |
| Interfaces: | 1 x USB 3.0 - 24 pin USB-C |
| Power |
| Power Source: | USB bus |
| Software & System Requirements |
| Software Included: | WD Discovery, WD Backup, WD Security, WD Drive Utilities |
| OS Required: | Windows 10 or later |
| Miscellaneous |
| Cables Included: | 1 x USB-C to USB-A adapter - external |
| Compliant Standards: | Directive 2002/95/EC |
| Enclosure Colour: | Silver |
| Localisation: | Worldwide (excluding China, Japan) |
| Package Type: | Retail |
| Manufacturer Warranty |
| Service & Support: | Limited warranty - 3 years |
| Environmental Parameters |
| Min Operating Temperature: | 5 °C |
| Max Operating Temperature: | 35 °C |
| Min Storage Temperature: | -20 °C |
| Max Storage Temperature: | 65 °C |
| Humidity Range Operating: | 20 - 80% |
