Client wants raw footage. How should I get it to them?

I filmed 3 long live talks, and the footage is over 500GB. This is one of my first times doing freelance work.

Their initial ask was just for edited videos, which I have enough storage for, but now they want to make some of their own edits as well. Is it on me to upgrade to a higher Google Drive plan, or should they provide me with a link?

Curious what you guys think is the proper way to do this.