Hello Gustavo & Jonas, Thank you for looking at this problem. This is not a major bug preventing me from using Strawberry, but just annoying. I know how to get round the problem but I am not sure my sister or some of my friends would. This could deter them from using it.

@Gustavo-L-Conte OK, but I still consider this as a bug! It should warn that the disk is not connected rather than erasing everything. That would be easy to do. If you have a large library, it will take a long time to rebuild.