I have a storage VPS with HostHatch - 10TB for $10/month. That pricing was from a Black Friday sale a few years ago. They may not offer it that cheap again, but it's worth keeping an eye out for their sales. They had something similar last year but double the price, which is still a good deal.
I use Borgbackup to back up the data to the HostHatch VPS. The most important data has a second copy stored with pcloud - I've got a lifetime 2TB storage plan with them. I know lifetime accounts are kinda sketchy which is why it's just a secondary backup and not the primary one.
I don't have any "disposable" files like torrents though. All the stuff I back up are things like servers that run my websites and email, family photos, CDs I've ripped myself, etc. I've only got a few TB total.