marktext/docs/PORTABLE.md

Portable Mode

Mark Text stores all user configuration inside the application data directory that can be changed with --user-data-dir command-line flag.

Linux and Windows

On Linux and Windows you can also create a directory called marktext-user-data to save all user data inside the directory. Like:

marktext-portable/
 ├── marktext (Linux) or Mark Text.exe (Windows)
 ├── marktext-user-data/
 ├── resources/
 ├── THIRD-PARTY-LICENSES.txt
 └── ...