Duplicate original project include component links

Hi there,
I want to know if upgrading my account is required for project duplicating.
I’m collaborating with a coworker on a Figma project. His and my accounts are currently both free ones.
Currently, we’re trying to copy every original project files from his account to mine, including all of the properties like component links.
Could we achieve that if one of us or both of us upgrade to a professional account? If so, what do we do next?
Are there any comments worth focusing on?
Please tell us on how to resolve this.
If you need further information to give best answer, please tell me to provide.