Always ensure you are using backups of games you personally own to stay within legal "fair use" guidelines.
: A USB drive or external hard drive formatted to exFAT to transfer the final PKG file. Step-by-Step Conversion Guide How to Play PS2 Games on a Jailbroken PS4 with PS2-FPKG ps2 to ps4 pkg download
Use PS2-FPKG or PS2 Classics GUI on a PC to select the image and customize settings. Always ensure you are using backups of games
If you own the original PS2 discs, learn to convert them yourself using PS2 Classics GUI. It is safer and more rewarding. If you do not own the discs, support the official releases—many PS2 classics are available on the PS4 Store for $10–15, complete with trophy support and upscaling. If you own the original PS2 discs, learn
If you aren't using a jailbroken system, "downloading PKGs" in this manner isn't possible. Instead, reviewers point toward: PS Plus Premium: Classics Catalog
Sony officially offered PS2 games on PS4 through the PlayStation Store, but the library was tiny (around 50–60 titles, depending on region). Each official release used a custom-built emulator wrapper per game, with tweaks for trophy support, upscaling, and save states.