USC does not have a waitlist, they never have, just fyi. There is a transfer thread every year that you should read through. There are always helpful active threads on the forum, check those out too. USC also has EVERYTHING transfers need to do on their website, read all of it. It is pretty clear. Still, every year, transfers with 4.0s are rejected, their admissions are holistic, so acceptance isn’t easy to predict. Good luck!
Thread for those looking to transfer next year:
http://talk.collegeconfidential.com/university-southern-california/2085731-2019-2020-usc-transfer.html#latest