Downloading PS2 games you don’t own a physical copy of is copyright infringement in most countries. AetherSXX is legal, but the games are not freeware.
Highly compressed games (especially .CSO files) require the emulator to decompress data on the fly while you play.
Most "highly compressed AetherSX2 game" collections on archive sites (Internet Archive) offer entire Redump sets already in CHD format. Look for packs labeled "PS2 CHD Collection" or "AetherSX2 Ready."
Downloading PS2 games you don’t own a physical copy of is copyright infringement in most countries. AetherSXX is legal, but the games are not freeware.
Highly compressed games (especially .CSO files) require the emulator to decompress data on the fly while you play. aethersx2 games highly compressed
Most "highly compressed AetherSX2 game" collections on archive sites (Internet Archive) offer entire Redump sets already in CHD format. Look for packs labeled "PS2 CHD Collection" or "AetherSX2 Ready." Downloading PS2 games you don’t own a physical