BTRFS File System uses new snapshot architecture that don’t require reserved space for the individual snapshots.
Differences are written directly on volume – therefore it is essential to make sure that not more than 90% of available space is used.
If you wish to use snapshots – this file system is the best choice.
You can create up to 255 snapshots per share.
Every BTRFS share contains special folder called “snapshots” – inside you can find the snapshots for your share.
Inside you can see the individual snapshots and their content. This way you can restore individual files quickly.