I currently have a three-year old ReadyNAS NV+ which offers 4 SATA drive bays with an implementation of RAID 5 across the drives. Each drive is 750GB, providing a virtual volume size of 2.25TB.
When I set up this device, the largest drive on my network that I needed to backup was only 750GB. Now, my iMac alone has over 3 TB of content to backup. There are two additional laptops on the network, but each has storage of under 200GB.
Should I replace the 750GB drives in the ReadyNAS with 2TB drives, expanding to 6TB of storage? Or is there a more cost-efficient solution that can leverage Time Machine? Upgrading all 4 drives would cost approximately $600.
Software/Hardware used: mac os x, readyNAS NV+, RAID 5
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