if you are on windows
connect your PSP to computer by USB
click start menu
go to "run"
type "cmd"
when the black window "command" pops up
type
x:
(where x is the drive letter of your PSP, if it's E then type e: )
hit the ENTER key
then type
chkdsk /f
hit the ENTER key
If it asks you to unmount the volume type
Y
hit the ENTER key
it will scan and fix those folders so you can delete them. then just reinstall SNES and you are good to go.
HTH
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