Test configuration file

$ sudo rsnapshot -t <hourly/daily/etc...>

On removing backup points and archived files

In short, remove backup points from configuration file and manually remove files from the smallest backup level’s “.0” directory (it’s usually hourly.0).

From rsnapshot man page

If you remove backup points in the config file, the previously archived files under those points will permanently stay in the snapshots directory unless you remove the files yourself. If you want to conserve disk space, you will need to go into the directory and manually remove the files from the smallest backup level's ".0" directory.

Please note that the other snapshots previously made of /home/ will still be using that disk space, but since the files are flushed out of hourly.0/, they will no longer be copied to the subsequent directories, and will thus be removed in due time as the rotations happen.