Network-Attached Storage distros include a barrage of features to enhance the utility of your backup and data archival server. On the file system front, you’ve got the Copy-on-Write and checksum facilities offered by ZFS and Btrfs. For folks with spare storage drives in their home lab, you can put together a reliable RAID cluster, and with enough memory in your NAS, you can even leverage RAM caching to push your HDD (and even SSD) speeds to the next level.