Crystal USB Flash Drive wonderful gift for Birthday, Wedding ,Christmas Storage Capacity:32GB 3.0 Real capacity Use A-class chip, can be erased repeatedly for 100,0000 times Environment Temperature: -40 C - +70 C Operating System: Win98/ME/2000/XP/ Vista/win7 /win8, Mac OS 9.X/Linux2.4 or above USB connection:support Hot plug & Play. Easy to read and read in high speed ,No need drive/power supply only plug in