Finder Crashes while trying to Open my External Hard drive

Every time I open finder to view files on my External Harddrive Finder closes.  Disc Repair does nothing, it says there is nothing to repair.  I know all my files are still there because they show up on another computer.  Please help!

Shut down your Mac.
Locate the following keys on the keyboard: Option, Command (⌘), P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on your Mac.
Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the gray screen appears.Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.
Release the keys.
Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.

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