I have Bufallo data link station 1 terabyte attached to my LAN.
I have created some shared folders and each of shared folder has user access restriction only for certain user.
One day I have to change my admin password.
Open Command Prompt (Start > Search "cmd" > Enter)
Enter the line: rundll32.exe keymgr.dll, KRShowKeyMgr
When the window comes up you should be able to manage stored keys.