Did you resolve your issues? If not go under Help, Download instruments and sounds, and download and install everything. Also, make sure that you have updated to the latest patch, 14.2.0.296.
Then go and sign up at the dedicated Magix Samplitude Forum and take a look at the information for new users. There are a couple of hundred tutorials by Kraznet and you will find out how to get the 70GB of Independence installed, and a lot more. The files are downloaded the first time that you enter Independence in Samplitude if I recall correctly, and you need to be prepared to indicate the drive that you want to put them on.
If you look in the present forum, you will see that the above and much more have recently been discussed. You should review this information.