Update README.md

README.md

@@ -74,7 +74,7 @@ source ~/.bashrc
 
 ## Import container images
 
-You can import a container image either from Nvidia NGC or Pytorch/Tensorflow official Docker Hub repositories.
+You can import a container image either from Nvidia NGC or Pytorch/Tensorflow official Docker Hub repositories. When finishing importing, you will find a sqsh file in your present working directory.
 
 - From Nvidia NGC 
 ```