CHD file is associated with MAME software application. MAME is an emulator application which is used for running old arcade games on modern computer systems.
In order to run any game on this emulator the user is required to have an image file of the game. This file is referred to as hard disk image and the file is given the extension of CHD. This file stores all the visual and audio information for a specific game. Once the game file is mounted on the emulator the user can play that game using keyboard keys. The game mechanism and logic is also stored in CHD file.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .CHD file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .CHD file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .CHD file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.