In general, you can view the disk space usage of the WIN8 system with the right key properties, and the used space shown is the same as the actual situation. But sometimes there will be a difference between the two, what is going on?
Workaround:
First, the need to open the display of hidden files and system files;
Second, the disk contains a similar "System Volume Information" folder, even if we open the display of hidden, view volume will not calculate the capacity of the, do not believe that you can right-click System Volume Information Folders view properties, typically 0 bytes, because these folders are not only hidden, but are also protected by NTFS permissions. Select all content directly to view the properties, see the size of the capacity is not included in such folders;
Note: The System Volume Information folder is a folder for system protection that holds the systems restore point.
The above is the WIN8 disk has been used space and the actual mismatch of the solution. Normally the disk has space and all the file size is consistent, the installation of the above method to view, you can achieve this effect.