I have been using sandisk product from avery long time they give u real product that is 100% genuine .The sandisk also gives u a quite good warranty . I have got 2 memory cards and a 32 gb pendrive still I haven’t encountered any problem . I would suggest u to buy any sandisk product without any worries . I would also suggest u to get sandisk product from the original sandisk site It would cost u cheapier than other sites . The pendrives and data storage has quite good write and read speed . I would definetly suggest u to get this product