What is a CTG file?
Developed by Canon, the CTG extension refers to the catalog index files that are created by the Canon cameras. Users will find these files in the CANONMSC folder, and they run parallel to the folders that the users save on their memory card. The CTG format holds the information about the number of images stored in the user’s SD card and gets deleted automatically if the user removes the corresponding file.
How to Make CTG Files
Below are some software programs that can open CTG files. Download one to open your file now.