How to access contents of a Windows-formatted USB-drive in OSX?

Hello. I am wondering how to access the contents of a Windows-formatted USB-drive in OSX?

This is an old USB drive from back in my Windows days and I'd like to salvage the contents since I no longer have any PC's to access it on..

When I insert the USB drive into my MacBook Pro 8,2, I get the message:

"The disk you inserted was not readable by this computer"

Is there any way around this? I do not want to have to reformat the USB-drive and lose all the information that's on it, but I only have a Mac now and no longer have access to a PC..

**I do not want to have to install Windows or Booty Camp or any of that nonsense either**

Any apps or ways to accomplish moving the contents off this drive? Thanks!