Qnap 3.th Party Backup Software Problems & How To Solve

1 -Try to create new share folder, and new user and fgive full permissions to that folder (including Guess access rights.

2 – Change “strict allocate = yes” to “strict allocate = no” in smb.conf file. (its under /etc/config/smb.conf. You can download winscp & connect your NAS as admin to access..

3 – Try Reseting system configration to your NAS (I suspect your network configrayion, maybe Ip adress, wrong subnet, wrong Load balance maybe..)
http://qnapsupport.net/teknik-destek/admin-kullanici-adimi-ve-sifremi-unuttum/qnapin-arkasindaki-reset-tusu-ne-ise-yarar/