@reinob & @michaaa62 :
yes it is really weird stuff, but the folders and files still can be access through n900 or PC. only file system showing RAW.
here the link picture for little imagination :
http://securenw.blogspot.com/2009/08...ccessible.html
(the picture is number 2 from the top
note: used and free space is normal not zero, capasity total storage 27Gb sorry i can't upload the picture b'cause the n900 not in my hand right now but i will up load as soon as possible) thanks.