Nested Sharing Problem

Hello. I have multiple nested folders that are shared with many different collaborators. I have one person that needs access to all of the folders. The Cloud won't let me share the main folder because it says that nested sharing is not suppported. Does that mean that I have to search within the hundreds of folders I have shared with over 15 people and remove all of their access in order to share all folders with one other person? That doesn't make sense to me. There must be another way. Please help because I'm out of the office on vacation next week and need my replacement to have access to all of my files. Thank you!