metal custom usb flash drive 1,Storage Capacity:128MB-64GB 2,chip:usb flash drive 3.Supports boot-up:USB-ZIP and USB-HDD Flash Drive 1,Storage Capacity:64MB-128GB 2 ... ,2GB, 4GB, 8GB, 16G,32GB, 64GB,128GBTransfer RateHigh speed USB 2.0 certified, USB 3.0Operating systemWindows 98/SE, Windows ME,2000,XP ...