trying to use pc ports off usb

[thedigi321]

I am having problem after using my usb0 for my roms mainly ports, like cave story and quake. Every other emulator works. I am getting this error:
sh: 1: /media/usb0/ports/cave story.sh: permission denied
and it is like that for all the ports but stuff like psx, gba, nes, snes, even MAME is working just fine and I did the same process for all. changing paths to my usb in es_systems.cfg.

is there a way i can fix it?

i cant really use my sd card because it is fake capacity and i dont want to lose my stuff

[thedigi321]

the ports i am talking about are stuff like cavy story, DOOM, QUAKE ARENA here is a video i followed
RetroPie Tutorial – Run games from USB instead of SD Card in EmulationStation

i just noticed it said emulationstation but it is really hard for me to get a response and i thought i could get better help here

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