SanDisk is very large company mainly we hear the name of SanDisk on pendrives memory card ect. I purchased a SanDisk pendrive of 16 GB in size it is a little costly. Shopkeeper suggest me this pendrive so I purchased this pendrive he say me that it is very nice quality pendrive so I purchased this pendrive from him , It perform well for some days after some days its speed of transferring data is losses and installation speed of software is reduced too much so I go back to that salesman and say him about this problem he say to me that if you have this type of problem in this case I cannot help you if you want to solve this problem then buy a new one. So I am suggesting you that don’t buy this pendrive buying this means wasting our money I never recommend you this product Becouse I donnot want that someone also faces the problem which I am facing now with this pendrive .