So I’ve been looking up VPN stuff, and in the process, I’ve stumbled on ProtonVPN, from the same people as ProtonMail. They’re now offering private cloud storage, and I’m wondering how private is it. e2e means I have to manage the keys on my device right? I don’t know how else it could realistically work, if they manage keys, they can access my keys etc?
There are a few end to end file storage options out there (including iCloud Drive if you enable “advanced data protection”, though that’s only useful for Apple users).
You might also check out https://cryptomator.org/ — it lets you use any storage provider but encrypt your files before uploading. Plus it’s open source.