TestDisk is a free tool for recovering lost data. At the same time, it can help repair corrupt or lost hard drive partitions. TestDisk was first released back in the 90s, and the fact that it is still used today means that the software is remarkably good.

What are the key features of TestDisk?

Recover files and partitions: TestDisk is a powerful and user-friendly program that allows you to retrieve deleted files and repair partitions. It can also be used on a bootable USB or CD disk, in order to revive broken hard disks due to software failures, viruses or human errors. The main functions of this application are called TestDisk Recover Partition and TestDisk Recover Files.
Supported files: TestDisk supports over a dozen file systems including FAT12, FAT16, FAT32, NTFS, EXT2/EXT3, IBM Multiboot, NSS, etc.

How to use TestDisk?

TestDisk data recovery has been trusted for decades by computer novices and experts all over the world. The website of developer CGSecurity has a useful Wiki section where you can find TestDisk tutorials for data recovery on NTFS, FAT and ext2 file systems.