I have both a My Book and a Passport connected to my iMac. I deleted some files from my My Book and I’m now getting the following message for both hard drives…
Your device My Book (S/N: [Deleted]) has RAID configuration issues.
Please launch the WD Drive Utilities software to get more information.
I do not have or have ever had a Raid and the WD Drive Utilities has nothing about it. I ran all the tests and they have all passed on both drives.