Hey there! I'm ready to upgrade my current 27" iMac to the 5k version, but instead of the 3TB fusion drive I was thinking of getting the 1TB flash drive and moving most of my media over to my external hard drive. I currently have a LaCie d2 3TB drive that backs up my entire iMac using time machine. I want to get a 4TB version and partition it so that half is used as the time machine backup and the other half holds all my media files (movies, music, tv, etc). I have backblaze setup so all my files are backed up offsite, but is this the best way to use my externals? Should I: 1) Get a RAID drive that would back up my new 1TB Flash iMac AND my current external hard drive? 2) Get the 4TB Lacie d2 version and partition it to use 2TB for time machine and 2TB for media files? 3) Keep the setup the same and get the 3TB fusion drive on new the iMac with the 3TB LaCie d2 backing everything up? I'm getting hung up on having files on separate hard drives and making sure they are backed up. But I want the speed the 1TB flash drive on the iMac would offer me. Thoughts?