Seagate Backup Plus 1TB Portable External Hard Drive for Mac USB 2.0 (STBW1000100) Formatted for Mac out of the box and instantly compatible with Time Machine software Impressive 1 TB storage capacity 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 HFS+ driver for PC and use the drive interchangeably between Mac computers and PC's Features USB 2.0 for quick data transfer rates; upgrade to Thunderbolt or USB 3.0 with the available additional adapter Keep copies of your files, in case disaster strikes