Suddenly in backup "destination file cannot be created" regardless of what drive I attempt to use.

Quicken (Win 2017 v19.7) seems to be working OK, but attempts to backup (which I do at the end of every session) shows error "Unable to create the destination data file." Tried different disks, deleted files with same date, nothing seems to work. Need to know if this is a software problem (reinstall), or a data problem (restore from older backup) so I can get it all back to normal. Thanks...

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