First of all...WELCOME!!!
I have a French one from 1800's, Search for an old posting of mine from Jan 5, 2009, "King Louis XV Sideboard".
Similar...yours doesn't appear French! BUT can you please post a close up of the ornamental elements please of the top? Also, how the shelves adjust in the top section.
This style has been around for a very long time - in my case it is a "buffet a' deux corps" - meaning a cabinet with two bodies! (If french in origin and it has a plate rack on top without doors it is called a "vaisselier" and in the US is often referred to as a cupboard.) Depending on where you are located and what you have been exposed to it can be called many things (sideboard, buffet, china hutch (American term)! They are essentially the same things. The French define a buffet as a small sideboard used for storing dishes with a flat top for serving. A sideboard can have a large mirrored back or a top with shelves or drawers - the purpose to display! Furniture manufacturers call my piece a Breakfront because the front lines have been broken - not continuous!