ZimaOS 1.3.2-1 on ZimBoard, shares DATA ROOT

I have installed ZimaOS on my ZimaBoard. However I am a bit lost.

I try to install Node-RED and that works,but where are all the data stored? I see the Volume /DATA/AppData/$AppDir/data in the Settings, however there is no such DATA when I open Files.

I also cannot share my directory on a HD connected to the SATA. What I see on Windows in the Network is the name of my Zimaboard as ZIMACUBE without any shares listed.

The MMC seems to be listed as ZimaOS-HD and that is not the Root as seen in CasaOS. I cannot access ROOT?

Conclusion I am totally confused and in this way it seems impossible to use ZimaOS onZimaBoard. The documentation does not contain any clue about those things.