How to transfer from zkSync lite to zkSync era?

Could you please explain the process of transferring funds from zksync lite to zkSync era? I understand that zkSync era is the latest iteration of the zkSync protocol, but I'm unsure about the specific steps I need to take to migrate my assets. Are there any fees associated with this transfer? Additionally, what precautions should I take to ensure the safety of my funds during the process? Any guidance you can provide would be greatly appreciated.