There are 2 pages where Inno Setup shows the required disk space: wpSelectDir and wpSelectComponents. On the wpSelectComponents page everything is shown correctly, but it's not on the wpSelectDir page.
What is the difference between DiskSpaceLabel and ComponentsDiskSpaceLabel? Aren't those the same?
I understand that the ComponentsDiskSpaceLabel shows the sum of all the components checked. What does DiskSpaceLabel show then?
The DiskSpaceLabel displays the minimal space needed for the application. It includes only the files that are installed unconditionally (those that do not belong to any components or tasks, etc).
The ComponentsDiskSpaceLabel adds the files belonging to the selected components to the size calculation.
Both calculations reflect the ExtraDiskSpaceRequired directive.
Note that Check parameters are not considered for the calculation. Neither DestDir parameter is (so temporary files are also included). The dontcopy flag is not considered either (which you have reported).
