I've been enjoying https://privacytools.io recommendation of https://cryptpad.fr/ service as my personal backup storage, but to certain extent only. Until I saw the restore option which invalidates any security since anything that was previously shredded or deleted can be simply restored with one click of the rewind button in any environment, either trash or main disk.
Since bacon can get your password/keystrokes from Microsoft without breaking any sweat. This invalidates https://cryptpad.fr/ as a trustworthy service on Windows because of it's ridiculous ability to restore any previous work session and any confidential files that might been deleted previously.
And since it doesn't have any email attached, It goes as secure as Microsoft exposing your password and login to pigs. Maybe I'm being overcautious, but intuition tells me to stay alert don't skip on small but yet critical details.