I'm thinking about buying a QNAP TS-419P+ Turbo 4-bay NAS. The problem is it's not very scalable. If I've inserted 4 disks and filled all the space, there's no way of expanding (Other than buying new disks in a larger size). Is there any hope in buying one of these now, then perhaps buying another one later and combining the two into one volume?
If the QNAP can't do this, is there another device that can?