Everything worked properly if you stick to the attached manual. This, however, is very poor and could be a little more comprehensive.
The App for iPad and iPhone functioned super.
The only downside is there only that the app is a separate library. It examines, for example, all images and places them then under the item "image" together.
The same with videos or music files.
This means that in principle, all files on the disk are also visible then. One then has no more hidden folder.
However, a folder structure to provide details. This, however, only in addition to and not in place of the library.
