Edit: After half day, my wife’s Mac started having the same problem. I have then applied the solution that I found in the Apple
Elgato Showcase Thunderbolt SSD @ CES 2012 –
You can expect to see the Elgato to be released around February but no price has been announced. Thunderbolt technology allows you to access transfer speeds of 10Gbps. No power supply is needed for this device as the power comes straight through the thunderbolt port. The device is going to be available in two capacities 120GB and 240GB.
You can get more CES coverage through out the week HERE