I was trying to copy folders from my lap top computer to a Newegg 256GB flash drive. It was an absolute disaster!. After the so-called copying, whenever I accessed the folders on the flash drive, they had nothing in them. Then I tried copying individual files. They seemed to have been copied at first. But when I closed the flash drive and re-opened it, the files were gone! Buyer beware! That flash drive was much cheaper than comparable ones that I saw online. Obviously I got what I paid for... nothing