Limit/tidy auto backups

I bought a new phone 3 months ago and decided to rebuild my Tasker setup, which had years of patches and old ideas.

The automatic backups have, so far, created 737 backups, 127MB, which is not sustainable or necessary.

If nothing else, it would be easier to tidy up if they had a name such as TaskerBackup20220220163212.xml instead of being in hundreds of confusingly-named directories, each containing one file, all with the same name!