Compatible Hard Drives: WD Western Digital My Passport Essential Western Digital My Passport Essential SE Ultra Edition (Model number beginning with WDBAAA) (160GB to 2TB) My Passport Ultra Metal Edition (1TB & 2TB) My Passport for Mac (500GB Only) Samsung Samsung M3 500GB Samsung M3 1TB Samsung M3 1.5TB Samsung M3 2TB Samsung P3 500GB Samsung P3 1TB Samsung P3 1.5TB Samsung P3 2TB Toshiba Canvio Slim for Mac 500GB Canvio Slim for Mac 1TB Canvio Slim 500GB Canvio Slim 1TB Canvio Connect 500GB Canvio Connect 1TB Canvio Alu 500GB Canvio Alu 1TB Canvio Alu 2TB Toshiba Stor.E Basics 320GB 500GB 750GB 1TB Buffalo Buffalo Ministation HD-PUSU3 500GB Buffalo MiniStation Safe HD-PNFU3 series (500GB & 1TB Only) Buffalo MiniStation HD-PCFU3 (500GB & 1TB Only) Transcend Transcend ESD400 Portable SSD (128GB to 1TB) Seagate Backup Plus Slim Portable Drive 500GB Backup Plus Slim Portable Drive 2TB Backup Plus Fast SSD 256GB Backup Plus Slim Portable Drive for Mac 500GB Backup Plus Slim Portable Drive for Mac 1TB Backup Plus Slim Portable Drive for Mac 2TB FreeAgent GoFlex 320GB FreeAgent GoFlex 500GB Sony Sony USB 3.0 External Solid-State Drive (256GB Only) Verbatim Verbatim Store "n" Go USB 2.0