Brief Analysis of the missing hard disk space in Windows 7/Win8

After you purchase a GB hard disk, you can see that the disk space displayed by the system is only a little larger than GB after you open the computer, you will be wondering where all the other buckets are running. There are several main reasons for the space that is incorrectly displayed by the system. For example, hidden and invisible files exist, and hidden and restored partitions created by the manufacturer exist.
Why is the hard disk display space not as large as the manufacturer claims? If you have noticed hard disk, USB flash memory, or other storage devices, you will find that the displayed space is always less than the claimed space. For hard disk manufacturers, 1KB = 1000 Bytes, 1 MB = 1KB, 1 GB = 1000 MB. That is to say, if a hard disk is 500 GB, it actually contains 500*1000*1000*1000 = 500,000,000,000 Bytes. The size of a GB hard disk is calculated by the manufacturer.
However, RAM manufacturers use 1000 instead of 1024. The memory conversion mechanism is as follows: 1 kb = 1024 Bytes, 1 MB = 1024 kb, 1 GB = MB. Let's calculate in reverse order how much GB 500,000,000,000 Bytes is charged according to the 1024 standard. 500,000,000,000/(1024*1024*1024) = 465.66GB in Windows, the conversion unit of data is always 1024, which is in conflict with the hardware manufacturer's 1000, this leads to deviations during conversion. This leads to the 35 GB gap.
Why is the remaining space displayed on your computer incorrect? If you notice the remaining space in the hard disk partition, you may feel a bit strange. If you want to study it in depth, right-click disk C and you will see the disk space marked as used. In, the space used contains 279GB files.
 
However, when you circle all the files in drive C (including all hidden files and system files), right-click and select Properties. You will find that the space occupied by all these folders does not match the space you just saw. See, we know that all files occupy 272 GB of disk space, but the actual disk space is already 279 GB, so where is the difference of 7 GB?
 
Originally, some types of files are not displayed in the resource manager. These invisible files include the System Restore Point and earlier versions of some files. If you want to check the space occupied by these invisible files in each partition, you can run the command prompt to check whether the files occupy the space. Note that you must run the task as an administrator. The specific operation is as follows: 1. Open and run Win + R, Enter cmd to open the command prompt 2. Enter the command vssadmin list shadowstorage
 
We can see that about 9 GB of Storage space (Used Shadow Copy Storage space) is occupied by these invisible files, and the above mentioned is more than 7 GB, however, we roughly use rounding to estimate, so this calculation should be correct. Next, we will talk about hidden partitions. Generally, the computer itself contains a hidden and restored partition. You can use the Disk Manager that comes with the system to view the hidden partition. As shown in, almost 11 GB of hard disk space is allocated to a hidden restoration partition.
 
Through this article, you have a clear understanding of the causes of the lack of hard disk space.