Is there something like a redirector such as %SYSTEMROOT% that is automatically put in by a u3 drive?
New: Aegisub (Jan 19, 2026), Platform 30.1.3 (Nov 17, 2025)
1,400+ portable packages, 1.2 billion downloads
Happy New Year! Please donate to support us in 2026!
All programs must be specifically adapted for U3. Any writes to the registry or the %APPDATA% or %USERPROFILE% directory must be handled within the U3 app.
U3 makes available certain specialized environment variables like %U3_DEVICE_EXEC%, but in practice, these don't make converting an app any easier than just working within a single directory like the portable apps due.
Sometimes, the impossible can become possible, if you're awesome!