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

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

FREE_LIMIT="1 GiB"

NUMBER_CLEANUP="yes"
NUMBER_LIMIT="0-50"

TIMELINE_CLEANUP=yes
TIMELINE_LIMIT_HOURLY="0-10"
TIMELINE_LIMIT_DAILY="1-10"
TIMELINE_LIMIT_WEEKLY="0"
TIMELINE_LIMIT_MONTHLY="1-10"
TIMELINE_LIMIT_YEARLY="0"
```