I think I'm having difficulty fully understanding subvolumes and snapshots. The /home partition is btrfs. I want to create a "backup" snapshot of /home/user (for example) but user has existed for years (previously ext4 > btrfs-convert). I believe you can only make a snapshot of a subvolume. I checked and there are no "default" subvolumes already present.

1) Is there another way for me to backup /home/user other than creating a subvolume /home/user2 and copying everything from user to user2 in order to snapshot it?