Why do you need cloud, if you don’t need public sharing?
You can connect to a 2-bay NAS with 20 TB of storage at home with a VPN. Fast, private, secure, practically unlimited storage, under your control. That much storage will be very expensive in the cloud. Proton is like 120$/year for 500GB.
You can also run unlimited applications for free on the same nas: photo management, streaming with apps like plex etc. Each of those apps is an additional cost in the cloud.
Because what you described is an unbearably complex, and highly unreliable solution. There is no way your home storage is more reliable than a geography-duplicated cloud center with 6 nines (or more) of data reliability.
If you love spending hours a day twiddling with linux configs, knock yourself out, but my time is worth more and the every arrow of opportunity cost points toward an integrated cloud ecosystem.
I prefer to save data in the cloud, and not "on the computer... in my house..." as the hank hill meme goes, because that hardware is painfully fragile.
Did you actually measure that? Because I did and self hosted NAS easily reaches realibility of any cloud in place without common power outages.
I'm not saying it's a good idea, but this myth about cloud reliability is a myth lately - all the corps have started squeezing for profit at the cost of reliability and availability.
No Linux configs, off the shelf NAS boxes come with their own operating systems. You learn a few concepts in initial days. The control plan is simpler than in a windows computer or phone.
You configure an offsite backup in the NAS.
Obviously you don’t have eleven 9 availability. But good enough for home use.
Sure, but you don’t need to pay a premium for end to end encryption like with proton.
You would encrypt (all or part of) your NAS client side with your software of choice (I use restic) and ship it anywhere off site: could be cheapest cloud, or another location you have access to.
I keep a home server for exactly that reason but I still use cloud for some things to have an off site copy as well. There are some things I don't want to risk losing over burst pipes, a fire, burglary, power surges, etc.
You can connect to a 2-bay NAS with 20 TB of storage at home with a VPN. Fast, private, secure, practically unlimited storage, under your control. That much storage will be very expensive in the cloud. Proton is like 120$/year for 500GB.
You can also run unlimited applications for free on the same nas: photo management, streaming with apps like plex etc. Each of those apps is an additional cost in the cloud.