Relatively easy-to-use U disk brands: silicom Silicon Valley, LG, SanDisk, Kingston, PNY, Patriot, Sony, BenQ, Newman, Digital China, Toshiba. Because the current workmanship of flash memory is relatively simple. So there are many parallel products or counterfeit products. In computer stores, it is common to see shop assistants pasting gold-plated XX brand cases on their own. When purchasing, please test on a real machine by copying files of its own capacity or running the V3 software. If the USB flash drive can run the software, it proves true. MyDiskTest is the first true USB disk expansion detection tool. It integrates several major functions: expansion detection, bad block scanning, speed test, and bad block shielding. MyDiskTest is a tool for identifying the expansion of mobile storage products such as USB flash drives/SD cards/CF cards. It can easily detect whether the storage product has been expanded in capacity and replaced with inferior ones. It can also detect whether there are bad blocks in FLASH flash memory and whether black chips are used without destroying the original data on the disk. It can also test the reading and writing speed of U disk and conduct aging tests on storage products. It is a must-have tool for you to choose USB flash drives and memory cards.