ExtraSubst

ExtraSubst is a secure and reliable utility for creating virtual disks from your computer's folders. It expands the built-in Windows subst functionality with a safe GUI that works in both user and administrator contexts. You can quickly assign drive letters to important directories without any risk to your physical disk partitions, which remain entirely unchanged. This method provides instant access to deep or network folders, significantly speeding up your daily workflow. For those seeking a comprehensive solution, ExtraSubst is fully compatible with the ExtraDisks software suite.