Disk Space Chart

Disk Space Chart FAQ

Here's a page from the extensive help system for Disk Space Chart. It is displayed as a help screen when running the program. To get the full picture Download Disk Space Chart and see the screen in its full context.

Here are some answers to queries you may have about Disk Space Chart.


Disk Space Charts is installed just like an ordinary program. Use the Programs and Features entry under Windows® Control Panel to list your installed applications and then select Disk Space Chart from the list.


You can use the software for a free trial period, after this ends you need to buy a license. You purchase a license by clicking on the Purchase button in either the Help or Options.

Space Analysis

Producing an accurate summary of the analysis of disk space is not an easy task. There are three main reasons why the figures displayed by DiskSpaceChart may differ from that shown by Windows Explorer or other applications.

Temporary Files

While Space Chart is running Windows will be creating and extending the temporary files it uses internally. This may lead to the total space indicated to be different from the total space when the analysis has been completed. Press Refresh to cause the usage data to be updated.

Disk Clusters

When space is allocated on a disk each file is split into one or more disk clusters. A file of only one byte must be allocated at least one cluster, on most disks a cluster may be well over 32,768 bytes large and so the actual disk space required to store a large number of small files may be far bigger than the total sum of the sizes of the individual files. Disk Space Chart uses the actual sizes of files rather than dealing in the number of clusters used by files. This will mean that the total disk space used for a large disk may be substantially lower than that shown by Windows® Explorer.


You can use compression to increase the amount of the available space on a disk drive. If you use Disk Space Chart on a compressed drive then the total sizes refer to the sizes of the uncompressed files rather than the compressed versions on the disk. The amount of compression achieved can vary considerably between files depending on the data stored in each file. This may result in apparent anomalies when dealing with large files because Windows estimates the amount of free space based on an 'average' compression ratio. Because binary files (.exe, .dll etc.) cannot be as highly compressed as text files (.xls, .doc, .txt etc.) deleting binary rather than text files of similar sizes will not save as much space as you might expect.

Recycle Bin

Because Disk Space Chart uses system interfaces to explore the contents of the recycle bin the folder named $Recycle.bin or Recycler will not be listed as an ordinary folder. You can view it by switching to disk mode and double clicking on the Recycle bin entry.

System Volume Information

When enabled, Windows® maintains backup sets of changed files on each disk drive. This information is not, and should not, be accessed by ordinary applications. If DiskSpaceChart finds this folder on a drive it will ignore it as it can not scan it.

Other User's files

Depending on the version of Windows® you are using you may be unable to view the files owned by other users. DiskSpaceChart will indicate the users it could not scan in the incomplete list. If possible it will offer an option to run as an Administrator so that these files can be scanned.

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