"Mega

This is actually a file storage platform, but cloud usage is likely to be handy at some point during your writing career. Dropbox paper would be another viable option, but MEGA comes with much more storage while purporting high standards of privacy and encryption."

I am surprised that you are rooting for Mega, which has criminal cases and is quite disparaged. See this,

https://gizmodo.com/mega-megaupload-kim-dotcom-crimes-security-van-der-kolk-1849093725

Why can you not find free and open source software that are ethical and free for people to work with? How about Nexcloud? /e/? Others?