MAKACTUA 50 Pack 4GB USB Flash Drives Thumb Drives Memory Stick USB 2.0 Black MAKACTUA USB Flash Drive ★ Available in Multi-color ★ Available in 1GB, 2GB, 4GB, 8GB, 16GB, 32GB, 64GB Capacities ★ Every Piece Tested and Formatted Twice Before Delivery ★ MAKACTUA is a Manufacturer of USB Thumb Drives for Several Years ★ Any question or concern, please do not hesitate to contact us, we are always here for you ★ We offer you 100% after-sale service and risk-free satisfaction guarantee and lifetime technical support to enhance your confidence to buy MAKACTUA USB flash drives. Specifications: Chip: Grade A Capacity: 8 GIG Interface Type: USB 2.0 (backwards compatible to USB 1.0) Transfer Speed: writing: 5-10MB/s; reading: 12-20MB/s ( Transfer speed performance may vary by capacities depending on host device,USB ports,the format of USB flash drive, file attributes and other factors) Compatibility: Desktop, Laptop, Macintosh, Tablet, Speakers, Car and all devices with USB port which can read/write data Operating System : Windows 7/Vista/XP/2000/ME/NT/98,Linux and Mac OS Operating Temperatures : -30°C to 70°C Storage Temperatures: -20°C to 85°C Package Content: 10 Pack 8 GB USB Flash Drives (10colors) Friendly Tips: ★ Some of the listed capacity on a Flash storage device is used for formatting and other functions and thus is not available for data storage. As such, the actual available capacity for data storage is less 8-10% than what is listed on the products. ★ FAT32 is factory default drive format, which is read/write compatible with Windows and Mac OS; while NTFS is compatible with Windows but semi-compatible with Mac OS. Please format it properly if need ★ FAT32 cannot write a single file >4GB, please format it properly