Can`t import .uasset unknow extenstion or doesn`t show

hi, i downloaded a free building pack from google and tried dragging the folder into ue4, but then it comes up errors of “Can`t import .uasset unknow extenstion”. Then i tried dragging the buildingpack into the content folder directory, when i open ue4 the folders are there but not the .uasset files.

This can happen if the files were created with an engine version that’s newer than the one you’re using. Could this be it in your case?

I dont think so it says “Free Urban buildings pack 4.25”