NAS Snapshots Are Not a Full Backup Plan
Snapshots can help roll back files, but they may not save your data if the NAS itself fails.
Backup Completed Successfully But Restore Failed? What to Check
A green checkmark doesn’t always mean your files are safe. Backups must be tested.
When I should replace my memory card?
Flash media devices can sustain only a limited number of write and erase cycles before failure. Mid-range flash media under normal conditions will support several hundred thousand to several million cycles, although write operations will gradually slow as the device ages.