The actual usable capacity of a normal 500g SSD is about 460g. If your newly purchased 500g SSD has only 200g capacity without dumping any data or downloading anything, it only means that you have bought a fake, solid or virtual SSD, otherwise it will not have only 200g capacity, For storage products, try to choose big brands, such as Kingston, Sandi, Samsung, Micron, Toshiba Seagate, Western Digital, etc., and try to buy them from official channels, the official flagship stores of JD and Taobao, which are also possible
