Can a NAS guarantee I will not lose any information in the event of a data breach?
Sadly, a data breach can hit anyone and the damage can be extensive. That being said no one is totally impervious. If the breach is extensive enough, the likely hood of information being taken is high. The intention of the NAS is to find a place in your disaster recovery plan so just having a NAS will not fully stop the chance, but it will give you more options to store data in more secure locations away from the possibly breach prone target