Sometimes, high-speed storage can read smaller, compressed files faster than large, uncompressed ISOs.

While there are pre-compressed games available online, many of those "Lite" versions are modified. If you want the full game without missing cutscenes or audio, you are better off compressing your own backups (ISOs) using lossless methods.

Fire up PCSX2, grab a legal copy of Need for Speed: Most Wanted , and compress it down. You'll be chasing police cars with only 50MB to spare.