The most important thing when working with TIBCO Spotfire is your data. All data is accessed by clicking Files and data on the authoring bar.
If you are a consumer user you will only have access to predefined analysis files, whereas author users can access data from multiple different sources. You reach all the different ways to add data via the Files and data flyout (reached by clicking + on the authoring bar).
Use the search field at the top of the flyout to find data from the library or in databases. Use the Browse local file option to locate files on your computer.
For more information, see Loading data.