What is a .CTG file?
A .CTG file is a type of file created by Canon digital cameras. It serves as a catalog or index file, which means it helps organize and manage information about the images saved on the camera's memory card. Specifically, the .CTG file keeps track of important details such as how many photos are stored in each folder on the memory card and the dates those photos were captured.
This file is not typically used directly by the camera owner. Instead, it is used by the camera itself to quickly access and display images when you are browsing through your photos on the camera. Because of its role, a .CTG file is not meant to be opened or edited manually by users. It does not contain actual image data (like the photos themselves), but rather information about the images.
Since .CTG files are not intended to be opened, there are no standard programs designed to open them. They are meant to be managed automatically by the camera. If you see a .CTG file on your memory card, it's best to leave it as it is to ensure your camera can continue to organize and access your photos efficiently.
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