I run a small design business with everybody working remotely and I want a storage solution where everybody can access all files at any time. I assume a NAS drive is the best solution. I also want a backup version of the NAS drive in a separate location incase of damage etc. Is it possible to have two NAS drives in different locations that somehow mirror each other. Is there an alternative storage and backup solution other than NAS. 500GB should be enough storage space but we do work with some big files 300/400MB.