Well I sure glad I keep my files on a separate drive. 
Just went upstairs to do a little work and I got the " No boot disk" message. On close inspection found my C drives SATA connection is real loose. The little plastic tab seems broken. 
So I'm just installing Windows on a extra drive I had on the shelf. 
Well see how long it take to get back to work. 
 
Anyhow you have a good plan , keep those project files safe! 

Thanks Cactus.   Scook you mean move ALL the "cakewalk content" files I currently have directed to  D    (HDD) to my S (SSD) samples drive?

The only thing related to SONAR on my project drive are the projects and their associated audio. Everything else is on a different drive. My "Cakewalk Content" which weights in at ~9GB is on my sample drive.

scook
The 250 is a much better idea. Yes, a full install of BFD starts at 50GB. But who stops with the factory drum sets? I only mentioned the 120 being small from my experience with Superior Drummer. I would also move the "Cakewalk Content" from the D drive. I ended up with it located on my Sample drive.

Exactly.
 
I think my entire BFD2/3 collections run to well over 200Gb. They should stop offering price reductions on their expansion packs