I had to export all of our documents and sheets out of Google Drive. I used something called Google Take Out, that packages everything and puts it somewhere where you can download zip files. It took a few days for it to be available. Except it didn’t do what it said it did. It didn’t export even half the files. I unpacked and compared with what was online.
In the end I had to download folders by hand. Took me half a day. And make sure they weren’t too big, because then it wouldn’t include everything.
I've exported to structured formats a handful of times, out of thousands of documents.
CryptPad really should build this though.