Features. 7200 RPM hard drive for extremely fast file transfers. Optional 256-bit AES hardware encryption provides an extra level of data protection. USB 3.0 offers universal connectivity for PC and Mac computers. Schedule automatic backups for your PC with Buffalo Backup Utility. Time Machine support offers scheduled backups for protecting Mac computers. Sleek chassis can be positioned vertically or horizontally for efficient use of space. Drive Interface - SATA 3 Gbps. Standards Compliance - USB 3.0 / USB 2.0. Connector Type - Standard B. Data Transfer Rates - 5 Gbps USB 3.0, 480 Mbps USB 2.0. Hard Drive Size - 4 TB