I have a laptop with a 512 GB drive and 16 GB of RAM, but Windows shows only a little over 400 GB as usable storage. The laptop contains years of college files and leftover software, and I recently started reinstalling games. Now the C: drive is nearly full, and Windows warns me to free up space whenever I browse the internet or try downloading an application, even one around 10 GB.
I have deleted school files, uninstalled games and applications through Windows, removed related files from File Explorer, and emptied the Recycle Bin. However, the C: drive is still almost completely full. The D: drive has more than 200 GB available, but downloads still seem to require free space on C:. I'm considering resetting the entire laptop. What is the safest way to find what is using the space and free it up?
4 Answers
The C: and D: drives may be separate partitions on the same physical disk. Having free space on D: does not automatically give Windows more room on C:, and many installers use C: for temporary files or default locations. Check the installer’s destination settings and move large downloads, documents, and game libraries to D: where possible.
If you want to start completely fresh, back up anything important first and perform a clean Windows installation from a USB created with Microsoft’s Windows Media Creation Tool. A clean install can remove accumulated clutter, but it will erase the selected partitions and you’ll need to reinstall applications and possibly drivers. The built-in reset option is less thorough, so make sure you understand the clean-install steps before wiping anything.
Use a disk-usage tool such as TreeSize to scan the C: drive. It will show which folders and files are taking up the most room, so you can identify the problem instead of deleting things at random. Be careful not to remove Windows system files unless you know exactly what they are.
Revo Uninstaller can remove leftover files from programs, while BleachBit can clean caches and temporary data. Also make sure apps were actually uninstalled through Windows or an uninstaller—not just deleted from File Explorer. Once you know what is consuming the drive, you can move large personal files or supported game libraries to D:.
I did uninstall the apps through Windows and also removed related files, but the C: drive barely changed. I’ll try scanning it with those tools; hopefully they’re straightforward enough for someone who isn’t very technical.