Anything within NPrinting ecosystem is maintained by Days to Keep and Reports to Keep parameters and they are responsible for housekeeping of native nprinting portal News Stand only.
If you are refering to File share in your network this is not integrated part of NPrinting ecosystem and needs to be maintained separately. There are no features in the tool allowing you to control content of destination folders.
You may need to consider writing custom batch files to do housekeeping or use 3rd party tool.
cheers Lech, When applicable please mark the correct/appropriate replies as "solution" (you can mark up to 3 "solutions". Please LIKE threads if the provided solution is helpful to the problem.