Christian, you may be better to copy the downloaded files directly from your audya using your computer as its quite tricky for sighted people to copy using pen drives! You will need to place them into a category sub directory though, not just the USER STYLE directory. (e.g. 'Unplugged')

Personally I removed all of the styles from my USER STYLE folder and only place in there the ones I use. That way I have access to the factory styles and my own styles separately to avoid confusion