Your standard PSP games will come on disc or UMD as they’re called. (Though some folk call them memory sticks, and others refer to them as memory cards, there isn’t any difference between the 2.) The standard PSP memory card of 32mb will just be large enough to do the job with modern games.
PSP owners as a rule should get the largest and best card inside their budget.
It’s not difficult any more to find reasonable deals on two or four gig models on eBay and Amazon. When you have bought your memory card, it’ll need to be formatted before you may use it. This may effectively wipe the card clean, and is an essential step, so don’t leave it out. This is the most logical place to put them. This isn’t complex, and will only need the standard USB wire to attach the 2, and the Computer should then accept the PSP and regard it as some kind of removable drive, like a flash drive or removable HD.
When everything is connected, you want to open up the PSP using the Computer and drag and drop the required files onto the PSP memory stick, just as you would with any sort of removable drive. It’s vital that as you do this, you put the files into folders marked PSP, and then GAME on your memory card.
You need to create these files if they’re not there already, and it is sensible to use all capitals. As quickly as you have transferred the games to your PSP, you should be ready to play them by opening up the GAME menu and selecting the game you need from the stick. You can get mistake massages, and these are usually due to incompatible firmware. It can suggest that you’ve got to downgrade the firmware for your PSP to be ready to play these homebrew games.