U Disk Memory stick Features: 100% New&High Quality Storage Capacity: 128MB-64GB USB 2.0 128MB approximately 100-120MB. 256MB approximately 220-240MB. 512MB approximately 450-480MB. 1GB approximately 950-970MB. 2GB approximately 1.6-1.8GB. 4GB approximately 3.5-3.7GB. 8GB approximately 7.3-7.6GB. 16GB approximately 13-14GB. 32GB approximately 28-30GB. 64GB approximately 58-61GB. Support USB version 2.0 and 1.0 Easy plug and play installation Interface: USB 2.0/1.0; Due to the inner system and procedure data will occupy some space and the real capacity will reduce lightly Stylish lightweight; portable,new concept modeling,classic fashion,compact Brisk High Speed; plug and play, in line with USB 2.0/1.0 specification, data transfer speed. Compatible with Windows 7/Windows 8, Windows XP, Windows Vista, Mac OS 9.0,Hi-Speed USB 2.0/1.0 port required for high speed transfer Support solution for Linux kernel version 2.4 or later version Driveless for OS 9X or up Durable solid-state storage No external power is required 4.5V ~ 5.5V from USB port Operating Temp: -10 to +55Deg.C Storage Temp: -20 to +55Deg.C