I was using Joplin for a while… Self hosted their server. On two occasions it screwed up on me and wouldn’t load my folders… Luckily I had backups but it was still frustrating. I don’t recommend them purely because the notes are stored in a custom format instead of just plain text files.
My favorite way of doing notes now is with git, currently using a free private repo on gitlab.
Just clone the repo on whatever PC I need them and it has backups and version control.
Then use GitJournal on my phone.
It’s perfect for me. I love it.
I know this says “Solved” but you should look into Gitjournal. You can use the one free private repo from gitlab to connect to. Just use vscode or similar on PC and Gitjournal on your phone. Version controlled notes, file based instead of database, can organize on PC via folders (Gitjournal recognizes the folders, don’t think it can create them though). I absolutely love it.
https://gitjournal.io/