I went from a NAS based solution to this case, I do not in fact been using the benefits of a NAS. On Mac OS X, associated with Elgato housing to enjoy the USB3, I'm very happy (very good speed, copy 170 GB in 30 minutes). Fan a bit noisy, I changed a 80mm Noctua NF-R8, everything is back in order. I use IcyCube with 4 discs, two 1 TB, 500 GB and 2 with a Mac OS X RAID 1 for data security. the flow rate varies between 75 and 100 MB / s.