DCIM acronym for (Digital Camera Images). It is a standard name of the root folder automatically created on flash memory cards by digital cameras where the captured images are stored. Nowadays, most of the Android Smartphone’s manufacturers like Samsung, Sony, LG, Micromax, etc and digital camera manufacturers such as Olympus, Fujifilm, Nikon, Canon, etc make use of the DCIM folder to store images.
The DCIM is just a directory part of DCF (Design Rule for Camera File System) first introduced by Japan Electronics and information Technology Industries Association (JEITA). This is the standard file system utilized by all digital cameras. So, whenever you connect your camera to Mac or Windows OS based computers \ laptops, your system will look up for DCIM folder. Alike, just in case if you connect your memory card via card reader to PC, then it will scan for the memory card folder named as DCIM and finally displays all the photos enclosed onto it.
The DCIM directory usually consist of numerous subdirectories with some unique alphanumeric character names like 123ABCDEF and three digit numbers which ranges from 100 to 999. Generally, this alphanumeric characters are not that much important because each and every camera maker is free to choose their own. For illustration consider this real time example: Apple manufacturer iPhone have five digit name and code is Apple on the other side DCIM directory contains folder like “100APPLE”, “102APPLE”, “101APPLE, “104APPLE”, etc.
Since camera photos are stored in the DCIM folder. Along with that other data including images can be saved on memory card. Even you can save text files and other media files in a different folder and easily transfer them to another PC directly from the memory card. But one thing you have to keep in mind that is, ensure not to drag extra items into the DCIM folder because it may cause your camera not to identify the list of photos.