Managing AUSST Storage Size

I am led to believe that there is no way to customise the setup and storage requirements of Adobe Update Server using the Setup Tool.

We use a virtual machine and the storage on the 'updates partition' just passed the 300GB mark. I don't believe that the size of the updates collection is warranted by the service that we require from that server (to update Creative Cloud).

I am considering manually removing updates from the AUSST folder structure for products that are not in use (such as CS5). I imagine the server will still believe that these files are present and so incremental synchronisation will continue to download only the newer updates.

i) Is there any guidance/rule of thumb regarding determining what updates would not be required (or generally managing the storage size)?

ii) As an option for AUSST in future, would it be possible to just maintain a log of last downloaded files so we could determine which files had not been required ever or for years?

Thank you.

(I placed the question here as I noticed a similar question previously in this forum)