Devices like the Steam Deck, Retroid Pocket 4/5, and Odin 2 have limited internal storage (128GB–512GB). A single 8GB PS2 game is expensive real estate. Compressed versions allow you to carry 100+ games on a 256GB microSD card.
If you genuinely need a 4GB game to fit on a 256MB USB stick (for old softmods), you must use lossy tools:
Many websites promise “highly compressed pack – all games 99% smaller.” Be aware of: high compressed ps2 games
| Risk | Explanation |
|------|-------------|
| Viruses | Executable files disguised as .7z or .exe installers. |
| Fake files | The archive contains a text file or empty folders, not the game. |
| Emulator incompatibility | Non-standard compression (like UHA or proprietary formats) won’t load in PCSX2 or AetherSX2. |
| Missing RAR parts | Part 1 of 12 is free; you must pay for parts 2–12. |
Safe sources: Internet Archive (redump.org verified sets), or your own legal backups only. Devices like the Steam Deck , Retroid Pocket
If you want to store the "Redump" complete PS2 collection (around 15,000 discs), the raw size is approximately 18 TB. With high compression (CHD), you can shrink that to roughly 8-9 TB, saving a fortune on hard drives.
This article does not condone piracy. High compression is a preservation tool. PS2 discs rot (disc rot is real). By compressing your own backups, you protect your investment. If you genuinely need a 4GB game to
Furthermore, the emulation community encourages compression because it reduces server costs for legal digital archives. The CHD format is open source and audited by the MAME team.
Many sites promise a 100MB Gran Turismo 4. When you download it, you get a .exe installer (not a game file). This installer often contains cryptocurrency miners or ransomware.