I have the 500GB My Book external. I accidentally started a re-format on the drive but stopped the process before it really had time to start. Now the computer says I need to format the drive in order to use it. I have  personal photos, music files and important documents that I cannot  afford to loose. I need a suggestion on how to retrieve the data from the drive

Does WD endorse any software or have a method that can be used for data retrieval .Thanks

I saw this on Give Away of the Day today Easy Drive Data Recovery  it’s good for about 6 more hours.I don’t know any more than that.