Right now when you setup the Microsoft Store for Business connector and when you approve apps in MSfB. CM downloads all new updates of this apps.

After a while, the storage used by staled versions is quite huge.
For example, if you approve 10 apps (especially Office Apps : Word, Excel, PowerPoint). If there are lots of updates on it, you can reach up to 40 GB of storage content after 2 years. Around 38GB are not used anymore and takes space on the site server.

You should include an automatic cleanup process to delete old versions.

Thanks