Guten Tag, folgende Info habe ich heute von QNAP bekommen! 
ZitatAlles anzeigenTom,
The issue is that AFP will be fased out soon - so please take note that in the future we wil not have afp support anymore so please do make arrangements for that when you will continue to use the QNAP NAS.
We are releasing the 4.1.2 firmware this week that will have some tweaks with AFP and support for MAC OS. Let see if that update will fix your issue
Regards
xxx
Ticket ID: BAR-782-14445
Betreff:AFP : Files get suddenly hidden-Flag / Some Files could not be overwritten by Illustrator, they kept old Daten without error message
Abteilung: Europe - Germany & Austria
Typ: File Sharing (Win,Mac,NFS,FTP), Qsync and Network Recycle Bin
Tom Langer