Navigating to the 'QuickStartContent' folder in the Editor, click the Content Browser's Import button to open a file dialog box.
Locate and select the T_Rock_04_D and T_Rock_04_n Targa (TGA) image files.
Click Open to begin importing the TGA image files to your project.
A confirmation box appears in the lower right corner of the Unreal Editor.
Click OK to accept the T_Rock_04_n.TGA normal map's settings.
Click the Save All button to save your imported images.
A Save Content dialog box appears.
Click Save Selected to save your imported assets.
Navigating to the 'QuickStartContent' folder, verify that UE4 created the corresponding .uasset files.