Hi hope someone can help. So ive got a 500gb external hd, which ive been using between a windows laptop+a mac. Ive used it mainly to get raspberrypi 4 images, however now im in a pickle! So when i have it plugged in my mac its showing as 132 mb, when its a 500gb drive! Ive tried allsports, formatting it in ms dos fat+fat32 previously on windows laptop. Can anyone help?