Can only use C: drive as "completed download folder"

[EpilepticKoala]

I have been using sabnzbd for two years in the same setup:

Got a laptop running sabnzbd (currently version 0.7.19) on Windows 8.1 Pro 64-bit.
There is a network disc mounted as Y: and still has 160GB free.

Yet since about less than a week ago, I can't use Y: as downloads-folder anymore.
Sabnzbd always claims the drive would be full and when I try to change the "completed download folder" in the settings,
Y: Doesn't even appear, all I can pick from is C:

Going back to an older version of sabnzbd did not help either, so I think a windows update causes issues.
The weird thing is... I can access the drive in explorer and do whatever I want.
Just sabnzbd doesn't seem to find it.

[shypike]

What happens if you just type in the path?
Does it stay that way?
Are you sure access rights are OK? Can you write a file to Y:?

[EpilepticKoala]

If I type in any path on Y: no matter which, it always complains, that it cannot create the folder, whether it already exists or not.
Via explorer I can access the drive any way I want.
Is the file/folder handling being done by the sabnzbd process or is another one responsible for it?

[EpilepticKoala]

Arg, problem solved... I was running sabnzbd with administrator privileges.
Turns out the drive is only accessible WITHOUT admin rights...
Now it appears nicely in the selection list again.

Thank you for your help