File synchronization solution for controlling type of sync for subfolders and devices?

Question

I have an app (Obsidian) that having this data structure:

Main Data/
├─ App Data/
│  ├─ Plugin Data/
│  │  ├─ Files.json
│  ├─ Files.json
├─ Files.md

I want to share the data to various people (or devices). Depending on their expertise level of the app, I want to have different types of sync to their devices:

Level	Files in Main Data	Files in App Data	Files in Plugin Data
Novice/First setup	1-way	Download once, then ignored	1-way
Advanced beginner	2-way	Ignored	1-way
Competent	2-way	Ignored	Ignored

Can you suggest me some solutions for this? Here are what I have tried and their limitation:

• Google Drive: lack of ignore feature
• Syncthing: the management of devices and subfolders are too complicated when the network grows
• Git: too advanced for non-technical users

The Wikipedia page Comparison of version-control software lists a great deal of software to try, but the criteria I need is not there.

I need it to have renames/moves and conflict detection. Other non-required options:

• Free
• Multi-platform: Windows, Mac, Android, iOS

Answer 1

My current solution is to make a custom installer and use git under the hood to clone the repo. The app will have an auto-pull feature, and if the user needs to push data upstream, they will need to be educated or tutored about git.

My next question: Simple installer-maker for minimal and graphical setup