Hi, I have the icns file to use for customizing my exFAT external hard drive. But every time I click the icon and drag the icns onto it (from the Get Info screen), I only see the default JPEG file icon. Some Googling seems to imply that it's related to permissions, but I cannot edit permissions in any way -- it only says "custom access" with no padlock or anything like that (screenshots attached below) Before dragging After dragging an icns file. What would be causing this issue, and how can I change the icon properly? Is it impossible to change the icon for exFAT external drives? Would appreciate any help. Thank you in advance.