Please confirm these before moving forward.

• I have searched for my feature proposal and have not found a work-in-progress/duplicate/resolved/discarded issue.
• This improvement refers to an existing feature. If you want to suggest a new feature, please use this template.
• This improvement is not a bug. If you want to report a bug, please use this template.

Describe the improvement

Currently, local backups are saved indefinitely. Add a number or date range indicating how many backups to keep.

Describe how this improvement could help users

Prevents overloading disk space with older backups.