Move many SQL Express databases to new server

Hi,

I should move 3 instances with around 30 databases to a new server.

Hos is the easiest way to do this? I can backup and restore but then I have to do it one database at time.

I don't wan't to use the internal export/import function, because it does not take security roles and so with it, and it's the same there, copy one and one.

Thanks.