I have read thread Backing Up Unencrypted Vaults - #2 by MaxSverdlove as I have same problem type. I would like to copy a source folder to an unencrypted vault to later backup this vault (reencrypted) to backup destination. Following the instructions in forum thread, I was able to mount unencrypted vault into a folder (winfsp(local) and mount to empty folder).
I tried several tools :
-Syncback SE : backup definition OK, run backup gives message “drive : does not exist”
-Acronis : the mount folder is seen as a file, so it can be selected as source “file”, not as destination
-EaseUs Todo backup : selecting mount folder as destination gives error 7DB2B263
I tried EASE ToDo and opted out due to China. Acronis has a lot of fans but I recall some issues with it but its a favorite among many. Macrium has a free option (and you can get a good deal if you wait for Black Friday sale if you need other options.) Great support too.
FWIW - I backup to an external drive that is Bitlocker secured. My backups are still not unencrypted per se, they are in Macrium format (.mrbak).
I think there’s one thing to consider if you choose to mount to a directory vs a cloud service, and that is all your encrypted files and unencrypted ones stay on the same drive, correct? So you don;t really get the benefit of cloud storage, just a local vault.