[header] How to recover raw files on pc or mac [title] Take the hard drive to a professional recovery service. [step] Before you do anything to the drive, if the data on the hard drive is important or irreplaceable, it's best to stop using it immediately and take it to a professional data recovery service. Data recovery is extremely difficult and best left to professionals. 
Do a google search for data recovery services in your area or send your drive away to various online data recovery companies. [substeps] Make sure you do some research to ensure the company you use is qualified and well reviewed.