When you hear the words, luggage/baggage/furniture/machinery', do you imagine SOME things?

I mean, if you have only one bag, I'm wondering if you sayMy luggage is over there. or sth.thank you!!

I always associate words such as luggage, baggage, furniture and machinery as being MORE THAN ONE of its individual. For example, I would say there is only one machine, but if there is more than one machine, then I would refer to it as machinery. Similarly, if there is more than one bag, then I would refer to it as luggage and, similarly again, if there is a chair, table, couch and bed in one room then I would call it furniture. In more direct answer to your question, if there is only one bag I would just say My bag is over there. Hope this helped.