Using Proton Drive and/or self-hosting for sensitive data—for the somewhat tech-savvy, buying a Synology NAS makes this pretty straightforward (though it's not open-source). There are plenty of tutorials on YouTube and the web that show you how to easily set up a personal or family cloud backup, and their photos app works great for photo backups. This would also allow people to self-host their own NextCloud instance on it.
Discussion
Terramaster NAS lets you flash the firmware to an open source OS
I like when you make posts like this.
Thank you. I saw your post before, encouraging me to post more about privacy and security again. I still post about it, but I keep things in their proper perspective—here is why I don't post about it as often as I once did:
Can confirm that Proton drive is excellent. as is the rest of their suite tbh.
I agree. Though, it is still a bit limited in the amount of cloud storage space they offer—my phone alone is 1TB—so for many, it is still not optimal to use for ongoing device and phone backups. Hopefully, Proton will see this recent Apple debacle as an opportunity to increase the storage space included in their premium accounts and release a photos app—making it an easier jump for most people.
Yeah the price more than doubles if you want to jump to 3GB plan.
*TB
Indeed. I'm on the Business plan and it's still not economical for full device/photo archive backups. I do like the fact that they automatically increase drive space every year I stay with them, though. If they play their cards right and dramatically increase their storage space, this event really could be their Gmail triumph over Yahoo Mail moment.
Can you self host all your proton data on a NAS?
You can use Proton with your own domain, but the core Proton services are not designed for self-hosting.
While Proton is open source on the client side, their service infrastructure is proprietary and cannot be self-hosted on a NAS or any other personal hardware.
AFAIK, the only self-hosting related options with Proton are using a custom domain with Proton services and utilizing their SMTP bridge for integration with other applications.