Backup or export/import of site objects

Hi All,

I'm trying to achieve the ability to copy or move document libraries or lists from one site collection to the other. Though I have check online and it seems to suggest that and import/export will do it, it does not seems to work. My problems seems to be the syntax for specifying where the library is.Please can you help. Also, is a backup/restore option for document libraries.

Thanks,

Dominic