Thanks JoKeR,
I'm now in the Guest mode and kind of scared of trying to go to the Authoization mode on the WebUI. I currently have 3 partitions (rather than just the public and private) and last time I tried, at the very beginning I found this problem
"The situation is that I had 3 partitions, after going to Authorization mode it did something to the whole disk (not just to the 1st two partitions) and then it emptied the 3rd partition (where I had already data!!! Sad ). I managed to reconstruct the partitions table and I have read the only thing I need to do now is to update the fstab file with the new information and the problem should be fixed after a reboot."If the WebUI is the only solution, I suppose I'll need to buy another external HD and back-up all my data there before I try, just in case.