I considered creating my own NAS or purchasing one like this for a very long time. Purchased DS218 and have never looked back; everything works and there is no tambourine dancing. Save a ton of time by setting it up once and forgetting it. I utilize drive-video-audio-photo-station, dlna, as well as disk synchronization, access via smb, and nfs. The realtek processor and 2GB of RAM are more than enough for the average home; the only time it experiences strain is when simultaneously indexing lots of photographs and viewing a movie.
18 TB External HDD Western Digital WD Elements Desktop, USB 3.0, black
95 Review
Shock-Resistant Transcend StoreJet 25M3 USB 3.1 Slim Portable Hard Drive with 500GB Capacity
99 Review
2 TB External HDD Western Digital WD Elements Portable (WDBU), USB 3.0, black
84 Review
8TB Seagate Backup Plus Hub Desktop Hard Drive with Data Recovery Services
56 Review