Backup and sync for free

Hello

It’s possible to make a backup or sync obsidian beetween my PC and my Iphone with the free version ?

I’m doing it between my pc(s) and my android with syncthing.

There are other ways via plugins too (remotely sync, obsidian-git, etc)

For backups you can used your PC’s usual backup system because your notes are just text files in a folder. If you don’t already have a backup system, now is a good time to start! On Windows, use the main search thingy to find File History. For online backups there are numerous options but the “free” requirement may complicate things.