the better brands of USB flash drives are silicom Silicon Valley, LG, SanDisk, Kingston, PNY, Patriot, Sony, BenQ, Newman, Digital China and Toshiba. Because the current flash memory work is relatively simple. So many parallel products or counterfeit products. In the computer city, it is very common to see shop assistants sticking gold XX brand shells on themselves. When purchasing, please test and copy the file with its own capacity or run the V3 software on the real machine. If the USB flash drive can run software, it proves to be true. MyDiskTest is the first real U disk expansion detection tool. It integrates several functions: capacity expansion detection, bad block scanning, speed testing and bad block shielding. MyDiskTest is a tool for capacity expansion identification of mobile storage products such as U disk /SD card /CF card. It is convenient to detect whether the storage product has been expanded in capacity and shoddy. It can also detect whether there are bad blocks in the FLASH memory and whether black chips are used, without destroying the original data of the disk. It can also test the reading and writing speed of the U disk, and carry out aging test on the storage products. It is a necessary tool for you to choose USB flash drive and memory card.