WD 3TB Blue My Passport Ultra Portable External Hard Drive - USB 3.0 - WDBBKD0030BBL-NESN [Old Model] Secure portable storage with up to 3 TB capacity Formatted for Windows. For Mac compatibility this Hard Drive requires reformatting. Refer to Application Guide for guidance on this 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