When I add music or photos on my computer, the AS library doesn't show it, although the watchfolders are updated.

What's the problem?

Hanspeter

When AS is installed, default watchfolders are applied. If those locations are not where you place your music and photos then you will need to change or add watchfolders to point to those locations.

Is that the problem?

The locations of the watchfolders are correct. But when I add music or photos to the music- or photo-folder (=watchfolders), AS doesn't update the library and I can't see the added files. It doesn't work even if I manually import the files with AS importer... It seems that AS doesn't update the watchfolders (although it says it does...)

Check out this FAQ, it might help with your problem.