I recommend using syncthing. It's very easy to self host but I actually use a SaaS for it: syncding.com. It gets me 100gb to 1tb of disk in which I can create folders and keep them synced with my 2 laptops, my phone, my server etc... I have an Obsidian vault with Meld Encrypt to encrypt some files, a keepassxc file I share across my devices and my todo.txt
It's simple to setup and will work forever instead of paying for different providers that might shut down or increase their prices.
I originally built it for my own setup (multiple devices, encrypted files, etc.), and it kind of grew from there.
Not everyone has a NAS at home, so the idea behind syncding.com was to provide a simple, encrypted online Syncthing hub that just works without the usual setup — with built-in ZFS snapshots for versioning and recovery.
Always cool to see others using similar workflows.
It's simple to setup and will work forever instead of paying for different providers that might shut down or increase their prices.