How to delete everything in a archive except a folder

[blueray453]

How can I delete everything in an archive except a folder name Important.

[infectormp]

This is not possible. You can read more about archive here https://borgbackup.readthedocs.io/en/stable/internals/data-structures.html#archives. This help you to understand why.

[ThomasWaldmann]

It's correct that archive content can not be modified after the archive is created.

But, it is possible to run borg recreate with patterns including only the stuff that shall remain and excluding everything else.
In that case, a new archive will be created (and the old one deleted, except if you use the option not to do that).

Using --list --dry-run or keeping the original archive is strongly recommended until you are pretty sure it only removed the stuff you wanted to remove.

[blueray453]

Wow! This appears to be my solution.

It's correct that archive content can not be modified after the archive is created.

But, it is possible to run borg recreate with patterns including only the stuff that shall remain and excluding everything else. In that case, a new archive will be created (and the old one deleted, except if you use the option not to do that).

Using --list --dry-run or keeping the original archive is strongly recommended until you are pretty sure it only removed the stuff you wanted to remove.