HELP! I accidentally discarded my work and now i can't find it anywhere, let alone even find what the Session Directory is!
Every X minutes during a session (the time period is customizable in Preferences—default is 2 minutes), and when you close MuseScore, all open files will be auto-saved to the session directory. Browse this directory to locate a backup of your file. Each file will have an auto-generated name, "sc*.mscz"— sorting the list by modification time may help you to find the file more quickly.
I have tried all these and the paragraphs below it but i am still getting nowhere!