Using ArcGIS 10.3.
The .kmz files show up as saved to the appropriate location in the shared drive of the computer. The drive appears to be "talking" to the GIS catalog fine; I can create a folder within the catalog and it will appear in the computer drive. I cannot, however, populate it with files that will then show up in the catalog.
It has been refreshed, and restarted, to no avail. The files work fine in Google Earth, and I have had no issue converting between the two in the past.