It's a crazy idea but could it work?
Basically my idea is this: Add in Proton Drive the ability to connect/link your app to other clouds such as Google Drive or OneDrive. (Why?) To view your files from the comfort of the app. AND! Upload files from proton drive to those clouds, and not only that, that Proton Drive encrypts them, so that when you see the data you uploaded from the third party cloud, it's just encrypted gibberish, that way those corporations couldn't scan your data! And by the way, when you see the data from Proton Drive, it could see the encrypted data.

So what I want to say, which proton drive should connect to other clouds to upload encrypted data, for people who use those clouds but have already paid and don't want to leave it.