Hi @rpetribu, apologies for such a delayed reply 
As a possible solution, you can use the “Generate Presigned URL” feature, meaning, you will have temporary access to files (to do all required operations), and after term expiration, the file becomes private again.
Yes, the plugin was recently updated with a new feature, to rename the files on upload.
Please use the plugin supporting documentation to find out more (search for “redefine fields”): https://docs.zeroqode.com/plugins/wasabi-cloud-storage#actions
Hope the provided answers help. Please let us know if we can help with anything else related to our plugin.
Regards,
Zeroqode Support Team