So you downloaded your copy of Disk Drill hard drive recovery software for Mac, and deployed it to your Applications menu. On the first launch you will need to install the new driver, which is required for correct hard drive recovery on Mac OS X. Enter your administrator password. After that you are ready to go!
Disk Drill offers unique data protection features that let you keep your data secure and not worry anything can be lost: Recovery Vault and Guaranteed Recovery. Recovery Vault creates a "map" for Disk Drill to help it find lost files, while Guaranteed Recovery creates an invisible copy of all files sent to Trash. If the recovery is necessary Disk Drill will look for such files in the first place.
Deep Scan of Disk Drill is exceptionally good for cases when there is hardly any file structure left. Deep Scan works through the raw data on your hard drive (FAT, NTFS, etc.). Disk Drill has a great knowledgebase of file signatures and applies it efficiently. Once the known signature is retrieved, it is much easier to recover files with XLS, DOC, AVI, MP4, JPG, and other extensions.