slicerliver:Here are a few small questions regarding loading Sample Data

After downloading and installing the slicerliver extension, in order to test the extension, when loading LiverVolume and LiverSementation data from the sample data module, it took too long to load. I guess it was a network transmission problem. I couldn’t get the data from the cloud. Is there any other way to get the data so that I can load it locally?
Do I need to re-download the sample data every time I reopen 3D Slicer and use the SlicerLiver extension?