Copy chdman.exe into the folder where your ZIP files are located. Open and paste the following code:

Grab chdman , run a batch script, and watch your 500GB library shrink into a much more manageable (and playable) collection.

To convert these files, you’ll need a utility called . This tool is included by default with any MAME installation. Method 1: Using the Command Line (Manual)

Double-click convert.bat . A command window will open and begin processing every ZIP file in the folder. Method 3: Using GUI Tools