There are many cool places to download useful 3D assets online. My fave is https://www.highend3d.com/.
Search for free assets. Be sure to check attribution though to make sure you are using the assets according to author wishes.
Be very sure that your models are low poly (have fewer polygons than many models) or Studio won’t display them.
Thanks for sharing @donnav 
As always, for anyone sourcing assets from a third party, make sure to refer to our 3D documentation, and the 3D limitations article especially.
All the best,
Seb
Sketchfab also has some very nice free models under various licenses.
Check out Archive3d. There arent very high resolution but you dont need that here most of the time.
Hi, Seb
I have a question is it possible to make 3D animation on Designer … Or if is it possible for Zapper to does a 3D animation design for those who want it. Like me or my company to use it
Thanks