Sandisk a believing product as I say in heading . So sandisk pendrive is very reliable for use and it is a great company that you can believe in the pendrive .your secure files personal files keep safe and secure by sandisk pendrive .sandisk comes with 16 , 32, 64, 128 gb and so on . this is come with 2.0 and 3.0 usb .samdisk memory card is also available on market for your android device you should buy the sandisk storage it is safe and virus proof great product given by sandisk .if u r looking for a external storage in your smartphone then you have to buy sandisk otg I also buy this otg that you can use in both mobile and computer devices so sandisk pendrives and otg is perfect and secure storage product . THANK YOU