Unless you're encrypting it first (via Cryptomator etc.), they already have lots of your data in easier-to-peek-at formats. You could always do your own OCR, an

Unless you're encrypting it first (via Cryptomator etc.), they already have lots of your data in easier-to-peek-at formats. You could always do your own OCR, and encrypt the results before storing it with them - though I accept that most won't, or use encryption at all for the files they keep in Dropbox, gDrive, etc.