if i could give Tom 10 stars, i would! I lost my entire month of Feb, 2014 business photos by accidently REFORMATTING the external drive then adding huge amounts of data on top of the buried data! I was told it was next to impossible to retrieve because of severe corruption but CDP never gave up! The data amount was HUGE so it took weeks of attempts but they did it!!!! Thank you Chandler Data Professionals!!!!!