How can I use a website I made, offline and reconnect to local files instead of files on the google drive?

I made a website that links to files loaded on google drive. Its a basic website and you can navigate to different sections and then access pdf files and images that are stored on a google drive. I need to figure out a way to make this be usable offline. I was thinking of just copying the whole website to a thumbdrive. However I dont know a way to make the external google files work offline. Is there a easy way to do this?