I’ve used AirVPN for this exact setup and it works great. The port forwarding is static and doesn’t change once setup. I switched to proton because it was convenient, I was already paying for ProtonMail et all, so I dropped the extra VPN subscription when it renewed.

I use restic with a wrapper script to automate it on all of my machines. The backend storage can be anything that speaks S3, so B2, or iDrive would both work. I currently use Storj for my backend. It’s globally distributed storage, so no single point of failure geographically and it’s cheap. Backblaze is also a great company, but I’ve grown a little skeptical since they went public.

As others have pointed out, just get a VPN and run your torrents through that. I’ve used AirVPN and ProtonVPN. Both are P2P friendly and even offer inbound port forwarding. It would be easier to setup and likely cheaper too. Proton is incorporated in Switzerland and has servers all over the world.

I’ve used backblaze b2 for almost 8 years now and it just works. I’ve never had any data lost by them in that time.

I just recently switched over to Storj.io as it a bit cheaper at only $4/TB as compared to B2 at $6/TB. Both are S3 compatible and work with just about every backup software out there. I have used Borg, Kopia and now Restic to do backups of important data. All 3 tools deduplicate all your data and reduces the amount of storage used. They also do encryption client side and are open source. They also have a built-in verification mechanism that checks the data is intact.

GrayJay just came out into the testing phase. It not only supportsYouTubee but also Nebula, Odysee, Twitch, PeerTube and a few others with more to come. Works great so far. grayjay.app. Built by Futo, a nonprofit company which Louis Rossmann works for. His video here