Hi,
The answer is probably related to this, although I’m frankly unclear on which sysex receive (if any) dn2 is compatible with. Maybe OS update via sysex but projects and presets seem to be an issue (i.e. not possible).
Might be best to email support for a more informed answer but I think the short version is that they need to be the digitone specific file format.
Hopefully I’m wrong, but all the more reason to ask elektron directly.
Edit: maybe try this?
I’m just guessing based on the available information so you’d need to experiment a bit.