First of all, please download and run the Intel System Support Utility for Windows and save the report to a file. Then, using the paperclip icon below the edit window, upload and attach this file to a response post.
Second, explain step-by-step what you have seen and done, starting from "My RAID array was working fine...".
Did you remove the failing unit from the array? Did you add the replacement unit to the array? Sounds like, no, since it is sitting independently right now.
You are correct, I have done neither since I’m not sure how to do that and I don’t want to lose the data on the the drive that W10 recognizes. Can you walk me through how to finish this project?