Maxonor USB 2.0 Flash Drive Waterproof Metal Pendrive High Speed Data Storage USB Disk (128GB)

I have tried countless times to download my computer files on to this flash drive. Nothing I do works. The files will show as being on the drive. Then just a few minutes late, the files have disappeared. I'm so frustrated! And now, it's too late to return them. What a waste of money. DO NOT BUY THIS PRODUCT!