Thx guys, We were finally able to get it to work... Formatted to NTFS (although all the things I read said to use FAT32 this was the ONLY thing I did different than before Other than restarting the vehicle 3 times) then went to my iTunes folder Drug the whole thing to the 58GB USB... once done tried in 2020 Sierra had to shut off the vehicle about 3 times before it finally recognized the USB now we have BOTH our iTunes in his truck idk how much storage is in these but mine alone was 20 Gigs??? Thx again