I´ve used the help & search function on the platform and searched for privileges download files
In the first result I have found this information:
Download actions (Category: Software management actions) enable the Axeda® Platform to transfer files to a selected asset. When the rule associated with this action type evaluates to true, the Platform downloads the file(s) defined by this action to the related asset. This action uses the functionality of a Download instruction created for a package created within the Content tab.