I did not buy them thinking it was a good deal but I wanted to test them and see if it's possible to discover how they manage to "program" it to change the capacity or to make it only work in the first couple of weeks.Ĭlick to expand.Aside from usual testing software, did you try filling them relatively close to their full stated capacity, then copying each of the files back to another location on your computer, and testing whether they still work? (something like large video files might make that easier) It's possible that the controller might disguise a smaller amount of flash memory as being more than it really is, which could work until the contents of the drive exceed its actual capacity. To avoid further misunderstandings: I knew before I bought the flash drives they were "fake" and they would not have the stated capacity (or that they would die eventually). I know there are a lot of tools that can test the capacity of flash drives but in my case this was not really useful.ĭoes anyone know if there are other tests or tools available (except for the tools that test the capacity) for detecting fake flash drives ? I think it's a hardware issue (bad/cheap controller inside?) but I don't know how they do it. I tried to fix it with diskpart but the disk dissapears from the list before I can select it. I tested it on different computers, I get the same error on every computer. Now a few weeks later one of these flash drives is dead: "unkown usb device, set address failed". I was expecting the flash drives to be very slow and only have a small percentage of the stated capacity but at first it looked OK.Įvery test always "confirmed" the stated capacity, but I wasn't convinced it would continue working. I tested them with some specific tools (H2testw, FakeFlashTest, ChipGenius. A few weeks ago I bought some cheap "Vansung" or "Vansuny" flash drives on Amazon.
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