4TB
Capacity: 4TB, with approximately 3.63 TB of actual formatted capacity.
Interface: USB 3.0, which is backward compatible with USB 2.0.
Data Transfer Rate: Up to 5 Gb/s via USB 3.0 and up to 480 Mb/s via USB 2.0.
Security: Built-in 256-bit AES hardware encryption using WD Security software.
Form Factor: 2.5-inch portable drive weighing approximately 243 to 296 grams.
Dimensions: Roughly 4.33 x 3.21 x 0.85 inches (11 x 8.2 x 2.2 cm).