Seagate Slim 500GB Portable Hard Drive for Mac USB 2.0 (STCF500100)

Ultra-thin portable hard drive, perfect for on-the-go
Formatted for Mac out of the box and instantly compatible with Time Machine software
Save feature enables user-generated content to be backed up from your favorite social network
Share feature allows multiple files to be uploaded to social networks at once from your computer
Install the downloadable HFS+ driver for PC and use the drive interchangeably between Mac's and PC's without formatting
Seagate Slim on Video