UnionSine USB 2.0 Flash Drive Memory Stick Pen Mac PC Desktop Laptop External Data Storage/Backup/Transfer Thumb U Disk Drives, Zip Drive, Jump Drive Feature: Read Speed: 25MB/s Write Speed: 8 MB/s Color: Black/Red/Blue (optional) Capacity: 16GB / 32GB / 64GB (optional) Interface: USB 2.0 interface, no drives, plug-and-play, hot-swappable Start: Start USB ZIP / HDD start up support. Data Retention: Data kept for at least 10 years Resistance: 100000 times rewritable Applicable models: various brand PC and compatible computer Operating System: Windows 98/2000/XP / 7/8/10, Linux 2.4.x, Mac OS Power supply: bus-powered USB (4.5 V ~ 5.5 V) Operating Current: <50mA Operating temperature: 0°C ~ 60°C Storage Temperature: -20°C ~ 85°C Package list: 5/10/20/50/100x UnionSine USB 2.0 Flash Drive Friendly Tip: Vendors are using Flash memory decimal arithmetic: 1 MB = 1000KB, 1G = 1000 MB Calculated, operating system with binary arithmetic: 1 MB = 1024KB, 1 GB = 1024 MB; So there are some differences between display capacity and nominal capacity of flash memory products 16 GB = aproximadamente 14 GB-15 GB 32 GB = aproximadamente 29 GB-30 GB 64 GB = aproximadamente 58 GB-60 GB