What app are you using (e.g. Himedia Media Centre, Kodi)? What protocol (e.g. Windows/Samba, NFS, uPnP)?
It sounds like a network problem, not necessarily a problem with the Q10.
I'd try test testing other apps like ES File Explorer to see if you get stable network access. If you do then it's a problem with the app you're using to access the media.