Gaina Mini Metal 512GB USB Flash Drive Keychain Style Memory Stick Gold Storage Capacity: 512GB Speed:Writing 5M/s,Reading 10M/s Keychain style : easy to carry, just put it together with your keys Portable and light but works well as other usb flash drive. Compatible with:ALL brands of computers,tablets,laptops with Windows 7/Windows 8/Vista,etc. 2 Year warranty.