You should consider the files you want to delete or make a backup
if it is really important to you.

there are websites try this,
Backup & Restore - Memory Card Deleted Data Restore - Memory card files recovery tool recovers, restore damaged, deleted, corrupted, formatted data and folders of various file types including JPG, JPEG, BMP, AVI, PNG, WAV, GIF, MOV, RIFF, MIDI, TIF, TIFF, 3GP, mpeg and other application document file fo.