You can create the file externally, it should work fine as long as syncthing can read it.
Ok, I need support for external SD cards, hope that it can be implemented in the future. 
With the exclude file, I can use it temporarily.
We all need many things, sadly some things are just not meant to be. This might get fixed in android 11 supposedly, yet I am skeptical.
I know, just hoping … ![]()
The workaround setup with three sync folders looks like this:
/storage/emulated/0/ /storage/<sd-card>/ /storage/<sd-card>/Android/media/com.nutomic.syncthingandroid/files
Excluded:
Android ...
Can watching three folders have a significance affect on speed and battery life? I need to test it anyway.
Does Syncthing work in Adaptable Storage when using the SD Card as your internal storage?
If you’re looking for a more recent Android compatibility thread.
Yes.
Is the storage access problem still with android 13?
It works well for me with the Syncthing-Fork app from F-Droid on Android 13:
- One has to select every directory manually on the initial setup but read and write access is possible - also when the directory is on the SD card. No root access is required for this.
- It may not be as fast as ever but it is fast enough. (I’ve never used Android 11 myself, only older and newer versions. However, I’ve read that Android 11 introduced a severe performance regression but it seems fixed in later Android versions.)