WD's automatic, continuous backup software works quietly in the background to help protect your data using minimal PC resources. Whenever you add or change a file, it's instantly backed up. Offering high capacity in a compact drive, My Passport is the ideal companion for anyone with lots of videos, photos, music, and files that they want to help protect and take on the road. Use WD Security to set password protection and hardware encryption and protect your files from unauthorized use or access. Type: Hard drive - external ( portable ) Capacity: 4 TB Hardware Encryption: Yes Encryption Algorithm: 256-bit AES Interface: USB 3.0 Data Transfer Rate: 5.0 Gbps (USB 3.0) / 480 Mbps (USB 2.0) Features: Password authentication, hardware encryption, automatic backup Power Source: USB bus Enclosure Color: Yellow Dimensions (WxDxH): 4.3 in x 3.2 in x 0.8 in Weight: 8.82 oz Localization: Worldwide (excluding China) Manufacturer Warranty: 2 years warranty Device Type: Hard drive - external ( portable ) Capacity: 4 TB Hardware Encryption: Yes Encryption Algorithm: 256-bit AES Interface: USB 3.0 Features: Password authentication, hardware encryption, automatic backup Width: 4.3 in Depth: 3.2 in Height: 0.8 in Weight: 8.82 oz Interface Transfer Rate: 5.0 Gbps (USB 3.0) / 480 Mbps (USB 2.0) Interfaces: 1 x USB 3.0 Power Source: USB bus Software Included: WD Security, WD Drive Utilities, WD Backup OS Required: Microsoft Windows 7 / 8 / 10 Cables Included: 1 x USB 3.0 cable Compliant Standards: RoHS Enclosure Color: Yellow Localization: Worldwide (excluding China) Service & Support: Limited warranty - 2 years Min Operating Temperature: 41 °F Max Operating Temperature: 95 °F Min Storage Temperature: -4 °F Max Storage Temperature: 149 °F