I wonder if they installed any kind of security software that prevents the data from being accessed via USB...? Have they tried copying out their photos using iCloud?
I would think using iCloud is only limited to the amount of subscription you have? So if they have 90GB of photos, and a 5GB iCloud account, it will not work?
No, it just means the latest photos are in iCloud. First in, first out. So they can copy out their photos and videos and delete them on iCloud and wait for iCloud to resync the next batch and so on.