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Which files can I delete?

Question / Problem

I was trying to clean up my harddrive. I already ran TreeSize and analyzed the drive, but how do I know which files to delete now?

Answer / Solution

TreeSize allows you to quickly analyze your data and realize where the disk space has gone to.

You forgot about a backup job you have running every night?
Your game library has grown up to several hundred of gigabytes?
Your streaming app keeps everything cached?

With TreeSize, such information becomes obvious. But all of these data exist for a valid reason, and only you can decide which parts of you need to keep and which you can delete.