@dysdummyish This has been discussed many times so here ya go.
A four year is 100% fine, I would never give up or change plans to attend a good four year if you have that option. USC can’t outwardly promote attending a four year with the intention of leaving, that would not be politically correct with other universities. So they “suggest” the cc route to appease other universities (not make them mad). But the advisor you meet with will tell you in person that attending a four year is fine. Frankly, that is one of the ideal situations for TTP. Go to another great four year and if it works out stay, if not, apply for TTP by Feb 1 (after having signed up for TTP and attended meeting, etc the summer prior).
They also cannot tell you to attend a CC on a maybe!
Also suggest you read through thread linked below, can start on post 186, it starts 2019 discussion or can read through entire thing for more info…