I just got off the phone with WD support. The tech asked me to download the WD Align System Utility - Powered by Paragon and try that. According to him, it’s preferred over the Acronis utility. I downloaded and ran it while I was on the phone with him, and sure enough, it recognized that the drive was an AFD and allowed me to align it. I ran the utility again after it was finished (took less than half a minute) and it now shows the disk as aligned.
Think I’m good to go now…
