Problems after Update to 6.4.0

Hello,

I yesterday updated my Readynas 104 from 6.2.5 to 6.4.0. Since then I have many Problems.

The Admin Page isn't reachable very often. Sometimes the I can't access the Voulmes via SMB. If it is possible to access them they react very slow. When I try to make a Backup to usb-Storage it fails after a few Minutes.

I read downgrading is no Solution. Is there any other Solution e.g. a total Reset ?

greetings

Tobias