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that can increase in size as you use your PC eventually taking up all the space. System drive (C drive usually) has many system files/folders such as temporary files, app data, libraries, etc. With a few hours of tinkering, I managed to free up 13GB of space without deleting even a single important file.
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With little to no room for deleting any data, I had to look for ways to free up space on my C drive that doesn’t involve deleting important data. I once wanted to install a 9GB game on my 20GB system drive with just 1GB free space (was the requirement of the game).
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