snapper -c root create-config /
snapper -c $USERNAME create-config /home/$USERNAME

vim /etc/snapper/configs/*
```
SUBVOLUME="/"
FSTYPE="btrfs"

SPACE_LIMIT="0.5"
FREE_LIMIT="0.2"

TIMELINE_CREATE="yes"
TIMELINE_CLEANUP="yes"
TIMELINE_MIN_AGE="1800"
TIMELINE_LIMIT_HOURLY="10"
TIMELINE_LIMIT_DAILY="60"
TIMELINE_LIMIT_WEEKLY="0"
TIMELINE_LIMIT_MONTHLY="0"
TIMELINE_LIMIT_YEARLY="0"
```