Unable to change Media Source location for LMS scan (Windows)

Running LMS 7.9.3-1597753178 on Windows, I'm unable to change the Media Source location from its current Path to what I need it to be in order to find my CD library. It is currently set to D:\Tim\Music, but after a hard drive replacement, all of my CD files are now in D:\OneDrive\Music.

On the LMS Control Panel, if I Add the new Path for D:\OneDrive\Music into the Media Folders window and then click Apply, a rescan doesn't find anything new. Additionally, if I exit the Control Panel and then restart the Control Panel, the original D:\Tim\Music appears in the Media Folders window but *not* the new D:\OneDrive\Music Path that I just added. If I instead use the Web UI and change the Media Folders Path under the Basic Settings tab, the same thing happens -- it just switches from the D:\OneDrive\Music that I added back to the original D:\Tim\Music.

Thinking that the issue might be because I'm trying to switch to a folder designated for Microsoft OneDrive, I tried a couple tests where I instead just switched the Media Folder location to a different location on my C: drive and also to a different location on my D: drive. In both cases, I got the same failed result.

There must be something basic that I am doing wrong.

Any help is greatly appreciated.

Thanks!

Tim