Last we I snagged a 1TB USB 3.0 drive for under 48 bucks so that's the cost of backup. Your claim is that you had everything backed up on the 2nd drive so loss of the 2nd drive would be the loss of the backup and not your originals.
Or did you misstate your problem?
How to recover files from a converted drive?
I had to replace my main hard drive and had everything backed up on my 2nd drive. After replacing, the 2nd drive now showed as a dynamic drive and was unusable. I had to covert it, and then tried to recover the files.. I used iskysoft (and a couple of free to try) software. Data was transferred (recovered), but 99.9% of all images and videos are not viewable. Any suggestions on how, or if, I can recover anything usable.