I have the exact same problem, has anyone resolved this ?
If I rightclick the folders for that spesific drive it shows the correct amount of used MB.
Though Storage Manager is not showing correct.
The disk im having problem with is compatible, ST3300831AS.http://www.synology.com/support/hd.php? ... duct_id=63
If I move files from the disk im having problem with, to the other working disk, it will clear space.
I also have the latest SW, DS211J.