PPSSPP saves to a psp?

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They should work. A common cause of issues is that saves from PPSSPP are meant to be compatible with official PSP firmware at 6.61.

Many CFW implement hacks to make games run on older firmware versions (such as 5.00) and these hacks make the games load and create save data differently than they would normally - causing them to not be compatible with PSPs running official firmware or with PPSSPP.

Can you try the following?

1. Back up your saves from PPSSPP (copy to another folder.)
2. Create new saves on your PSP and copy them to PPSSPP's folder.
3. Check if the saves load in PPSSPP, or if they also give errors.

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