Snapshots help protect stored data by recording the state of thick volumes, thin volumes, and LUNs at a specific time. You can restore data to a previous state if the data is unintentionally modified or deleted. Single static volumes and legacy volumes do not support snapshots.
To use snapshots, your NAS model must support snapshots and must contain at least 1 GB of memory. For details on compatible models, see www.qnap.com/solution/snapshots.