I use EaseUS ToDo Backup tool to perform a number of backups daily to my local NAS drive. With a recent drive failure, I decided to bump up my Proton plan and now have 3TB (combined) storage. I attempted to create new scheduled Backups to Proton's cloud DRIVE - assuming EaseUS supported it, but they don't YET.
I send the enhancement request to EaseUS and figured submitting it to Proton would increase the chances of this being accomplished.