Setup Playnite for multiple computer or user accounts.

This command may be helpful

subst G:\ C:\path\to\game

This convert C:\path\to\game folder into a dedicated G:\ drive

subst /D G:\

Undo the changes

Might require a restart, more reliable option

reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\DOS Devices" /v G: /t REG_SZ /d "\??\C:\Partitions\G" /f