: Indicates the original source format of the video from which the thumbnail was extracted.
: Programs like Premiere Pro or DaVinci Resolve create "peak files" or "thumbnail caches" with similar alphanumeric strings to manage project assets. 40489A9A Mp4 Thumbs jpg
: If you found this after running data recovery software, it represents a recovered preview image rather than the full video file. Is it safe to delete? : Indicates the original source format of the
: The standard image file format for the thumbnail itself. Common Contexts Is it safe to delete
: This is typically a hexadecimal hash or a unique identifier. It is often used by software to link a specific video file to its corresponding thumbnail in a cache folder.
: Many Android devices and apps (like WhatsApp or Telegram) generate these files in hidden folders (e.g., .thumbnails ) to speed up gallery scrolling.