You may have suddenly found that your storage devices (USB keys, hard drives) are no longer installed automatically.

This is probably due to software GParted.

Open a console administrator (root):

$ Su --
enter your root password
Then made the following file deletion:

# Rm-f / usr / share / hal / fdi / policy / gparted-disable-automount.fdi
Restart your USB device and everything should now be correct.