Hi,
As part of proper housekeeping, you should delete PSA requests on a regular basis. PSA is not a data store and especially with full loads, it can consume a lot of database space. I suggest to only keep the last requests (e.g. 5) to be able to analyze and solve incidents with uploads.
You can use the corresponding Process Type in a Process Chain. You can define criteria such as "older than x days".
Best regards,
Sander