Using RAID in NAS setups is crucial for data resiliency, but it shouldn't replace backups altogether due to the potential ...
This can cause issues with vibrations, particularly for 3.5-inch mechanical drives. Firmware and endurance are other concerns since the drives themselves won't be built with RAID and NAS in mind.
In short, for basic NAS use, the key RAID types are called RAID Level 0, 1, and 5. RAID Level 0 is straight-up striping, with your data spread across several drives for speed, with no redundancy.