Before leaving the house tonight, I powered down my iMac. I never do it, I always just put it to sleep, but tonight I powered it down. When I got home, both my WD external HDs were empty, and their icon on the desktop was changed to the original. Does anyone know WHAT THE HELL HAPPENED??? One is a 4tb drive, with 3tbs of movies, and the other was a 2tb drive, with all my work on it. Now they are both empty. You can see that they show 2tb and 4tb available, but I dont understand the part that says used. One shows 838mb used, the other 1.09gb used. What is that? Regardless, are my files gone?