This page says: “Our development and support teams currently use the latest version of Ubuntu; as a result, we may not be able to provide support for other Linux distributions (including other versions of Ubuntu). Additionally, read about Hardware and Software Specifications , and make sure your system has at least ten (10) gigabytes of disk space before performing the following steps.”
In reality this came out to be 78.7GB. It might be better to update this to state “make sure your system has at least eighty (80) gigabytes of disk space”.