How can I identify what application is using the file?
Often when I try to eject my external USB hard disk, I get this message:
Problem Ejecting USB Mass Storage Device
This device is currently in use. Close any programs or windows that might be using the device, and then try again.
How do I find out what the device in currently in use by?
(I’ve already tried Unlocker, it always says “No locking handle found.”)