Here's why and what you can do:
* FF7 is a PS1 game, not a PSP game: The PSP does not have a built-in PS1 emulator, so you cannot insert the PS1 disc and play it.
* You need a PS1 emulator: To play FF7 on your PSP, you'll need to find a PS1 emulator for the PSP. However, this is not something you can easily get on a PSP.
* Other options: If you want to play FF7 on the go, your best options are:
* Play it on a PlayStation console: You can play the original PS1 discs on a PS1, PS2, PS3, or PS4.
* Download the PS4 version: A remastered version of FF7 is available on the PlayStation Store for PS4.
* Get the PC version: The PC version is also available and can be played on a laptop.
Disclaimer: Emulating copyrighted games may be illegal in some regions.