Kingston 256 Gb Datatraveler 300 Capacity: 32GB. Transfer files at speeds of up to 10MB/sec (read) and 5MB/sec (write). Store, carry and easily transfer your files. Convenient: Pocket-sized for easy transportability. Simple: Just plug into a USB port. Compatibility:Windows 7/Vista/XP/2000,MAC OS X v10.3.x+ Linux v2.6.x+ Storage Temperature: -20 - 85C / -4 to 185F. Operating Temperature: 0 to 60C / 32 to 140F. Practical: Stores cap securely on end of device to prevent loss of loop to support most keyrings.