Unhappy [Q] Accidentally changed permissions of network drive with Root Browser App!

This might be a first in stupidity!

I was trying to mount a Seagate Central NAS on my phone and accidentally messed up the drive's permissions.

What happened :
* I managed to mount the NAS
* It wasn't letting me write files to the NAS so I thought I would have to change the permissions of the mount folder.
* Using Root Browser App I accessed the permissions of the folder(the mounted NAS) and ticked the boxes for "set UID", "Set GID" and "Sticky".
I don't even know what those 3 boxes mean???
* What a mistake! Now I cannot access the NAS from any machine on the network. In windows I get the error "You do not have permission to...."

Is this recoverable? Any help would be greatly appreciated