Last night, the external drive worked and this morning, no luck. I have all my older backups, my music and movies on it. I have a 500 gb USB LaCie that's about 2 years old. The blue light is flashing rapidly like it's trying to read, but it doesn't show up on the desktop. The dog got tangled in the usb cable last night and pulled it out at the computer USB port. I got a warning "You have removed a device improperly" or whatever it says. I was not using the external drive at the time the dog moved it. The drive did not tip over. I plugged it back in and went about my business. I don't remember if it mounted or not at that time. So now, I can't get it to mount. I tried a different USB cable and the other USB port on the MBP but it still won't mount. Any suggestions?