[itsme]

@IanH: There must be something wrong with your workflow.

I created this file structure:
   
d:\HerbertsGoogleDrive\_MobileSheets\ (marked in blue) is my MSP folder.
Then I created two MSP libraries and batch-imported the folder
d:\HerbertsGoogleDrive\_MobileSheets\MSPTest\IanH\bass\ into ianh_bs.db
and the folder
d:\HerbertsGoogleDrive\_MobileSheets\MSPTest\IanH\voc\ into ianh_voc.db
That worked just fine, as expected.
Here
https://drive.google.com/drive/folders/1...sp=sharing
I shared the respective files. In folder _add you can find the databases as well as backups.

@Mike: the backups there might also be test cases to reproduce the bug with losing subfolders when restoring with MSP on windows. I did not try it yet myself.