I have used two sandisk pendrives till date both functioning properly. 1st pendrive I have been using for 5 plus years with 4gb storage suporting usb2.0 and other is ultra dual with 6 gb store and usb3.0 support as well as usb otg support which I have been using for almost 1 year. Both were durable and reliable products. Im looking forward to use other sandisk products in future.