Ridata 32 GB External Solid State Drive (SSD) RDESSD32G-R-BX eSATA Multiple Operation System supported, no driver needed in Windows 2003/XP/Vista, Mac 9.x or later, Linux Kernel 2.4 or later. Full Compliance with USB 2.0; true Plug & Play connection. USB bus powered-- from USB port, no external power or battery needed for with any USB port 2.0 eSATA bus powered: Powered from USB port, no external power or battery needed (*for use with notebook combination eSATA/USB ports) Shock resistant, noise-free and secure data retention, plus low power consumption