First some background: I had a MP 3,1 with all four drive bays filled with the following: Drive Bay 1 - Macintosh HD: Applications, Documents and some media (Music, iMove DB, and iPhoto stuff) Drive Bay 2 - Media (movies and more music) Drive Bay 3 - Uncompressed Media e.g. things that are ultimately going to be encoded (probably using HB) to Drive 2 Drive Bay 4 - Time Machine My nMP arrived last Thursday and it contains a 1TB SSD. My old Macintosh HD had 970GB. In order for the migration to occur more quickly, I moved all the contents of the Music, Movies and Pictures directories off to Drive 2. This left my Macintosh HD with ~495GB. Needing a home for the information in Drive Bay 2 & 3, I bought a Drobo 5D. So not only did I transfer all the media that used to be on those drives, but also the Music, Movies and Pictures directories as well. In setting up the nMP, iPhoto and iTunes have been pointed to the moved libraries and everything is functioning well. This brings me to the last part of the equation...Time Machine backups. I realize that I can partition the Drobo and use it for backups, but for some reason I'm nervous about doing so. For example, I could not remove a drive from the Drobo, put it in an external enclosure, directly attach it to a machine and restore. Therefore, I *think* buying a dedicated external enclosure for Time Machine is the way to go. So here are my questions: For TM backups is there any need to go the TB route or is USB3 fine? Is there any need for the TM backups to be in a RAID either striped or in parity? The plan is to completely back up everything on the internal drive of the nMP, but is it necesary (or even possible) to back up some of the items on the Drobo? After all, aren't those items insulated from failure by the fact that they're in a sort of RAID anyway? Sorry for the super long post and thanks in advance for your help!