Hi Community,
since a couple days i use omv and be very happy with that - Great Job 
Now i sell my synology 
Made the Installation via repository on an raspbian (pi3) System is Running smoothly but not to stable as with an installation fom the omv image. I attached an external USB storage as the Storage for the NAS
So, what i want to do:
New install with the omv image an reconnect my existing HDD.
Can anyone tell me what file to backup to have the users (ACL) and settings again after reinstall?
Is it possible just to install and then say mount the existing hdd with my data?
Thank You