Subst your Windows-UserData with Workbench (portable)
No need for clipboard-sharing etc. use the data directly.
This should work with different user-names on Windows.

1. mount the substed T: drive in your WinUAE-config
   save and close WinUAE!

2. start WinUAE.exe from a batch for easier handling

3. copy an Amiga Disk-Icon to your T: drive first.

4. carefull, not all progs like this, Opus4 fails.

Look at the WQHD-Picture with my AmiKIT as best example.
P.S. OneDrive works too.

Freeware...