A: No. A real PS2 cannot read CHD or CSO files. You would need a modchip and an OPL (Open PS2 Loader) with a specific build that supports ZSO (a different format), but it is unstable. Stick to raw ISOs for real hardware.
Smaller files mean fewer write cycles to your emulation drive. high compressed ps2 games
For game developers, high compressed PS2 games offered a way to distribute their games more efficiently. By reducing the file size of their games, developers could create more content, such as demos, trailers, and updates, without worrying about storage constraints. Stick to raw ISOs for real hardware
If you want the absolute smallest file size (but cannot play it directly): By reducing the file size of their games,
: This is currently the gold standard for PS2 emulation. It is a lossless format that uses Zlib or LZMA compression. Best for : PCSX2 (PC) and most modern mobile emulators.
A standard Unix compression format often used by the PCSX2 emulator to run games directly from a zipped state.