mklink /J "C:\Users\YourName\Applications\EmulationStation-DE\ROMs" "E:\RetroGames\ROMs"
mklink /J "D:\ES-DE_Portable\ROMs" "E:\RetroGames\ROMs"
For saves and states (optional but recommended):
mklink /J "C:\Users\YourName\Applications\EmulationStation-DE\saves" "E:\RetroGames\SharedSaves"
mklink /J "D:\ES-DE_Portable\saves" "E:\RetroGames\SharedSaves"
For simple file exchange without full network stack:
We will use Oracle VirtualBox because it is free, powerful, and supports multiple communication links.