Your hosting account can overuse resources if you are hosting a file repository or large collection of files.
Here are some common indicators of excessive disk space usage:
You can try to correct file usage issues by following any and all of these steps:
If you are still experiencing issues with resource usage, review your hosting for other possible causes at Common causes for resource overusage (Linux).
You will want to make sure that you are correcting the underlying cause to any resource issue. Simply removing Websites and/or files without correcting the underlying issue can cause the problem to recur.