Hi there, Sharon!
While there is no specific space for luggage in the rooms at
Disney's Pop Century Resort, you should be able to find an area for your things.
There is a collapsible luggage stand for at least one bag; you can likely stack a couple of bags if they have been emptied of items. And there is a closet area in which you should be able to stash some of your suitcases as well.
Below the window is some real estate into which you can likely slide a bag or two, and there is also room near the in-room table.
If your bags can "nest" inside one another, that will definitely be a space saver.
While Cast Members are not able to store empty bags in the luggage room, with some clever placement, you should be able to manage your things with minimal effort.
Have a wonderful time!
See you later, celebrator,
-Deborah B.