I'm trying to use ArcMap to make a basemap and I currently have an unzipped folder full of files including .atx, .gbdindexes, .gdbtable, .gdbtablx, and .spx. I'm well aware that these files cannot be 'added' into the ArcMap database as is. So I've made a .gdb file and I can find the .gdb in both the Catalog and 'Add Data' menus. However, I am not sure how to add the files mentioned above (atx, gdbindexes, etc) into the .gdb in order to add map data into the map.
Can someone help me out? I'm not familiar with these other file types and how the folders work together.