yeah I agree it’s strange but it is really as is.
The “game” folder signifies it’s the game content folder.
So my image is placed in:
Content/Textures
And the extension is the same as the asset name - yes it is strange but is needed in 4.15 at least. (This might be fixed in 4.16 though where for gearvr at least you don’t need to specify this strange extension anymore.)