3706 WT-UPG3.0-BK-256GB USB Flash memory 256GB USB 3.0 driver 256GB High Speed (Up to 110MB/s) 256GB Memory - Read :110Mb/s Write:70Mb/s Support OS:Windows Me/2000/XP/Vista/7/8 Linux Kernel2.4 /MAC OS 9.x Warranty time for 1 year Interface :USB1.1/2.0/3.0 / Plug and Play 6cmX0.6cmX2.2cm LxWxH , Weight :23g