Where does memory go when reinstalling Qt?

Question

Qt

Good time of the day!
After reinstalling Qt 5.4, I noticed that there was less free memory by a couple of gigabytes. Although I installed it exactly the same as last time. I decided to check, repeated the above, as a result I lost a couple more gigabytes.
Deleted normally, through the Control Panel-> Add or Remove Programs.
Where does the memory go? Are there any other files left after uninstalling QT?

Answer 1

Look in the folder where Qt is installed. Perhaps you have 2 versions.
You can also use the SpaceSniffer program and see what is taking up space.