Ok, so i tested a new installation, at least the first two problems
- Boot-Videos seem to be a bit zoomed in/cut off at the top & bottom
- Share partition won't show up when i connect the SD-card via USB-adaptor to my PC (Win10)
still remaining. Regarding the first one it seems that others also have this problem. I would appreciate any help what i have to do to use the sd-card on my pc to access the share-folder.