My mass storage device folders have red - marks and are empty
Last night I was using my Lacie hard disk to play iTunes through my Bose Revolve. I discovered that my old iTunes folder had far more music than Music on my new laptop.
This morning nearly all the folders on the Lacie have a red minus sign against them and seem to be empty. My new MacBook is away for repair and I am dreading I've lost everything.
MacBook Air 13″, macOS 15.5