Non-cloud as not chained to the provider's storage services, I want to decide how to sync it between my devices. I want a tool for my notes, not SaaS. I wouldn'

Non-cloud as not chained to the provider's storage services, I want to decide how to sync it between my devices. I want a tool for my notes, not SaaS. I wouldn't mind paying for my tool chain, what I wouldn't want is paying rent for my own notes.