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Performance logs end up in the UserData\Log folder of your rFactor 2 install. We keep the last 5 sessions. There should be two files per session, named after the session and ending with the extension .csv and you need to send us both for diagnosis. If they are large, feel free to zip them.
Mini Dump File
A mini dump file exports information that can tell us why the game crashed, and can be helpful in finding issues.
Where to find it?
You'll find the file in steamapps\common\rFactor 2\UserData. The file will be name rFmini.dmp. Make sure it was created at the same time as the crash.