Although getting rid of unwanted hard drive files is a good thing for performance in general you have to make sure you have also considered the risks before proceeding. Keep
in mind that our important files may be deleted by accident by the software tools
we may be using, and even when you handle the cleaning without use of software. In
any case the cleanup process for any excess files using either method, takes your
time, specifically when done manually however software use will can consume time.
But generally the risks are minimal if due care is taken and the performance benefits
balance any of these negatives.
Search the internet and you will find many cleanup tools that in each case, view
the problem of cleaning up a hard drive from a different point-of-view. A popular
example is the content filter, you pay for some and others you can download
at no charge. But this is not all that software can do, some have other functions,
ie. they can clean up free drive space, check the drive for porn and remove it,
find programs that are not properly licensed, and show where drive space is being
used.