I use a Cisco NLSU2 NAS device. Its an older unit but does the job for me. Mine only has 2 slots but I have 2 - 1TB drives and all PC's in my house write to one of them. I then back up the one to the other on a weekly basis. All my kids music, videos, games, pictures etc are stored there with no issues. There are several other options out there like the Addonics NAS adapter but I have been very happy with the performance of my Cisco device.