If the other system allows you to export links into a single file, of usual file type, then you can import these into Netsso (up to your maximum quota, if any, in your Netsso). Full instructions are given under the Desktops/Import Favourites command, which describes the process of exporting from other browsers, and importing the bookmarks into Netsso. It will also tell you what your maximum remaining quota is.
When imported, you can then drag and drop the links onto appropriate desktops in your Album(s).
Some new users like to start off their use of Netsso by importing many links from other systems.