Haw

Could someone explain how to race online On Forza 4 Online ?

You need to go to a car you know has tunes you do not use and delete them.

To delete when in the tuning menu press the share button, load, scroll to my tunes find them and instead of load choose delete.

There is no file manager.

I am not sure of the exact number but in previous games there was a limit of 300 on saved tunes (yours or someone elses).

yes sounds like you hit the tune limit. Good luck extremely annoying. Happened to me in 6

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