chdman-android-guide

Go to (do not use the Play Store version; it is outdated). Search for "Termux" and install it. Why F-Droid? The Play Store version cannot run CHDMAN due to Android API limitations.

Setting up CHDMAN on Android requires 10 minutes of initial tinkering and a willingness to type a few commands. The reward is a ROM library that takes up half the storage space on your phone or tablet.

Before we dig into the commands, let’s look at the "why." CHD is a lossless compression format originally developed for the MAME (Multiple Arcade Machine Emulator) project.

Merge messy multi-part .bin and .cue files into one neat .chd .