Q: Cannot open one folder via my harddrive on my new macbook air, but opens find on old macbook. It says "can’t be opened because you don’t have permission to see its contents."

Hey guys,
trying to open a folder on my harddrive full of photos but it comes up with "can’t be opened because you don’t have permission to see its contents."
ive tried making all permissions 'read & write' on both computers and ive also tried clicking the lock in get info section on both computers.

all the other folders on the harddrive containing photos are fine to open just this one for some reason

help please

cheeeeers