: The standard image file format for the thumbnail itself. Common Contexts
: 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? 40489A9A Mp4 Thumbs jpg
: Indicates the original source format of the video from which the thumbnail was extracted. : The standard image file format for the thumbnail itself
: Short for "thumbnails." These are low-resolution preview images created so your device doesn't have to load the entire video file just to show a preview icon. 40489A9A Mp4 Thumbs jpg
These files are cache files. If you delete them, your device will simply regenerate them the next time you browse your folders. Deleting them is a common way to clear up "Other" or "System" storage space on mobile devices.