If you don't mind a text-based interface, PhotoRec is incredibly powerful. It ignores the file system and goes after the raw data, making it great for formatted or damaged drives. Memory cards and heavily corrupted partitions. Cost: Free and Open Source. 3. TestDisk
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The moment you realize files are gone, stop writing new data to that drive. New files can overwrite the "deleted" space. If you don't mind a text-based interface, PhotoRec