Why are we buying a USB flash drive or memory card that is smaller than the size of the label above? --"Badboy"

When it comes to this size problem, a lot of people feel like they're being dug up. Hey, that we first from the computer in the size of the unit, the smallest storage unit in the computer is bit, if not drill down, is bit, 1TB=1024GB 1gb=1024mb 1mb=1024kb 1kb=1024bit, this is the most basic unit of computer (there are bigger, For more information, please login www.baidu.com     i id 1977870896AA), but manufacturers in order to more convenient operation, such as 1TB=1000GB ....    So do some storage equipment manufacturers such as do a 8G u disk, when the production finished in the computer operation, the computer recognition and the way the manufacturers are different, so every G minus 24M so that the remaining 7.8g  7.8g Minus to make a USB flash drive when you need to store some system files and other supporting equipment to work on the file so since, there is about 7.5G left, so said, so calculate down 8G is 7.5G of 93.75, so say buy a U disk is generally marked capacity of 90% or so there is no problem, Note that the 8GU disk is not less than 7.2G generally 7.3 to 7.5 or so is normal. So we are not a pit, but a recognition method in the computer. In the eyes of the manufacturer is 1G in the computer eye is 1.024G