RE: Redgate Backup - Won't Delete All Files Before Backing Up

I think you will get more assistance if you provide the code you are currently running.
You can adjust database/server names for confidentiality.

I know we had an issue with this some time back, but in recent versions no problems.

Be sure to pay attention to any TAPE backup that may be picking up(locking) the previously created file.
You should be able to rename the file as a test to see if it is locked.