system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 how does freeing up storage space make your computer faster?
gpt
In general, it doesn't.

If your hard drive is almost completely full then it can have an impact. Your operating system may temporarily dump some of the values it's tracking in RAM to your hard drive to make use of RAM for something else to speed things up. If there's not enough space on the drive to do that, it could affect performance.

If you have 1 tb drive and go from using 700 gb to 500 gb it won't make a difference with respect to performance, though.