Howdy. A query to any folks who are using the CalDigit AV Pro 4TB (or any size) single drive solution with their late 2012 iMacs. Please comment on the following, if possible: 1) Drive configuration type: 2.5" SSD or 3.5" HDD? 2) USB 3 or FW800? 3) Brand of SSD/HDD? 4) General comments about the AV Pro's performance (Likes/Dislikes) Appreciate your feedback. Cheers.