TestDisk is a free application designed to recover data from hard drives in which the boot sector has been damaged or partitions have been accidentally deleted.
Thus, TestDisk is capable of reconstructing the Boot Sector of FAT12, FAT16, FAT32 and NTFS systems, restoring partition tables, recovering deleted files, etc. To do so, it follows the following steps:
1. Launch the application.
2. Select the storage device that you want to restore.
3. Indicate the kind of partition table: Intel, EFI GPT, Mac, Sun, XBox,...
4. Choose one of the options that the application offers, depending on what you need.
Furthermore, together with TestDisk you'll find PhotoRec, a tool that is specialized in recovering images from the memory cards of digital cameras, even though it can also be used to recover videos, documents and files from hard drives and CD-ROMs.