Removable storage medium that allows data to be written and erased as many times as is required, ideal for capacity expansion ,- Removable USB 2.0 storage medium ,- SanDisk SecureAccess software included (download necessary): protects your private files in an encrypted, password protected folder (128-bit AES encryption) , ,System Requirements: ,- Operating system: Windows 8/7/Vista/XP/2000/ME, Linux, MacOS X v. 10.1.2 or higher