Memory Stick-compliant flash drive offers portable storage in a compact package with plug-and-play convenience. Write speed is up to 5MB per second with USB 2.0 interface. Read speed is up to 12MB per second. 4GB flash drive is compatible with USB 2.0 & 1.1 USB ports as well as Windows ME, 2000, XP, Vista 7, Linux 2.4 or later, Mac 9.0 or later. Flash drive does not have password protection or encryption protection.