Btrfs can do so much more than the older XFS technology. This includes subvolumes, snapshots, and quotas. Btrfs subvolumes are an exceptional tool that allows users to create multiple snapshots or subfilesystems within a single Btrfs filesystem. These subvolumes are displayed as distinct directories in the filesystem hierarchy, but they utilize the same storage space and can be managed independently.
The flexibility and versatility of subvolumes make them ideal for various purposes, such as creating backups or isolating different parts of the filesystem for easier management. Snapshots are particularly useful since they offer read-only copies of the filesystem at a specific point in time. With snapshots, users can restore files or entire subvolumes to a previous state or easily create replicable backups that can be moved to another system.