Is it hard to transfer from a 4-year university to UCLA or UCI

I’m currently attending ASU as freshmen, I want to transfer to UCLA or UC Irvine next year, is it possible? If so what do I have to do to meet the requirement? Thanks.

Not that easy especially when your targets are in much higher level of (admission) selectivity.

As an OOS 4 year university transfer, you have low priority but not impossible. You need to look at assist.org and try to match the required courses for transfer for these UC’s with your ASU courses. You also need a minimum 60 semester/90 quarter units completed by Spring before transfer. Not sure if you are a Arizona Resident or California Resident. If you are a CA resident, it would be an easier admit if you finish your 1st year at ASU and consider a CA community college starting Summer to complete your 2nd year.
UCI has TAG where you are guaranteed admission if you meet the course and GPA requirements but can only TAG from a California CC.