Thumbs.db Files

Every time you open folder using thumbnail view (you see content of file image instead file icon) Windows creates hidden system file Thumbs.db in that folder with cached thumbnails. This have been made to let you quickly access to thumbnails next time. If you'll delete the folder Thumbs.db file will be deleted too. However, if only some images were deleted Thumbs.db file will still contain their cache of thumbnails.

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