Can't add files to usb on router

[noglasses]

Hi! I've got the AC66u router with a usb-drive connected to it. When i reboot the router it works for read/write files but after a few minutes i cant add any more files. I've been checking the settings and i don't know what i'm missing..

Anyone that can help me out to use my network drive as "normal"? I've even got the guest sharing avaible but i cant add any files

 

[noglasses]

After a few minutes when i reboot the router and try to add a file it askes me for a name and password to add a file.. I've been trying the router login and other names but none seems to work.

 

[wocram]

What kind of computer are you using?
I am using an Apple Macbook Pro and it is known that Apple has problems with the SAMBA protocol.
I do all file transfers to my router connected storage over FTP with FileZilla.