I dropped my passport for mac-2TB-and now my macbook pro doesn't recognize it. Light still comes on- you can hear it working but no icon on desktop. It's photos of a once in a lifetime and I need to get them back. Would be willing to do most anything.
I'm really sorry to hear about your WD My Passport for Mac. 🙁 Unfortunately, it's highly possible that the drop has physically damaged the external HDD. Either way, I'd recommend you to go to Disk Utility and try to repair the drive from there. Here's a tutorial from our knowledge base that can assist you with the troubleshooting: http://products.wdc.com/support/kb.ashx?id=2819gJ
In the future, I'd suggest you to always have at least two copies of your data backed up in separate locations. Unfortunate events like this one are exactly the reason why having multiple backups is always a good idea!
Most likely internally damaged. You can take it to your local tech shop, or better yet Geek Squad at Best Buy and they should be able to recover your files, but for a price.