The multi-function USB OTG flash drive transfers and copies 4GB digital data from mobile and tablet, it uses 3.0 USB high speed for rapid data transmission. The user just needs to plug and play, it has an A-class chip that can be erased repeatedly 100,0000 times without causing any damage. The rate of performance depends on the different operating systems available and various flash adopted so the speed may be different. It uses various Operation systems such as Win98/ME/2000/XP/ Vista/win7 /win8, Mac OS 9.X/Linux2.4 or above.