Why u disk capacity will not be enough

A 8G u disk, inserted in the computer display capacity of only 7 points a few g, can only copy 7 points a few g of the file past, is not the purchase of the virtual label of U disk? In fact, this conclusion should be incorrect, or to see the specific problems, the following will give you to analyze it:

Because u disk manufacturers are calculated according to 1g=1000m conversion units, and the computer is calculated according to 1g=1024m, so the market on the nominal 8G capacity of U disk, the actual capacity is only 8*1000=8000m, not the 8*1024=8192m we understand. This 8000M capacity with 8000M divided by 1024m/g (computer) =7.8125g=7.8g, and then buckle some of the system file space may only be 7.5G, so you buy the 8G genuine U disk, on the computer display capacity is not 8G, generally in the 7.5G float.

This kind of situation, commonly appears in the storage industry's hard disk, U disk, MP3, MP4 and other storage products, the principle is basically similar, because these products have hidden partitions, used to support hard disk, U disk startup and MP3, MP4 playback and other special functions. So buy is a 8G u disk, on the computer display is less than 8G, as long as in their own computer can be copied into 7.5G or so files, and the normal use of these files, is normal, is not a virtual standard U disk.