The new release of the Space Admin for Confluence App, allows far more efficient attachment management as well as the configuration of automated rules.
The Space Admin Browser now supports renaming, moving and deletion of attachments. Automated rules for the deletion of previous attachment versions can be configured using the Attachments Service. By choosing the context, in which the attachment versions have to be deleted and saving the configuration, it is possible e.g to delete all previous versions of an attachment at the end of every month.
For more information, visit the Marketplace.