WD 500GB Black My Passport Ultra Portable External Hard Drive - USB 3.0 - WDBWWM5000ABK-NESN [Old Model] Secure portable storage with up to 2 TB capacity Optional 256-bit AES hardware encryption Automatic local and cloud backup Stylish design with a range of exciting colors USB 3.0 connectivity. 3-year limited warranty. Formatted for Windows. For Mac compatibility this Hard Drive requires reformatting. Refer to Application Guide for guidance on this