Yes it is all the “UUID”
thats copy paste from retro pi terminal after “sudo blkid”

Again when i have the folder “retropi” on the local dir of the usb [main directory] it does not allow me to be able to see its content.

when I use the below i cant see the files when i try the see LS
“cd /media/usb0” 0-7 (tried all of them)
“ls”