does not work..
but you helped me to find out something!
could it be that nzbget starts before my fstab is executed?!?
because if i
umount /mnt/un
i still have a /mnt/un/asmedia-ASMT1053-01/downloads/ with inter, nzb, queue, tmp..
when i delete all folders an restart my pi.
do again an umount, the folders are again there..
also after a reboot i get a old download folder which was the first one and his name was /mnt/un/asmedia-ASMT1053-01/Downloads/
Somewhere i read that a catipal letter could be a problem an therefore i change it to "downloads"
but as i said after a reboot "Downloads" (with capital "D") is also created?!?!
EDIT:
OK the Donwloads folder with capital D was form pyload
I disable autostart of nzbget, after that the folder downloads was not created in /mnt/un/asmedia-ASMT1053-01/downloads/
then i started nzbget manually and folders where created on nas not on the local sd card, so far so good..
but unfortunately again "could not create file.."