: Unlike some older CSO tools that can be buggy, CHD is a lossless format. You can convert a CHD back to its original bit-for-bit ISO or BIN/CUE format at any time using Superior Compression : CHD files are typically 35% smaller
A PSP CHD can reduce the size of a standard ISO by 20% to 50%, depending on the game’s data structure. psp chd internet archive extra quality