Use the importer to upload classifications into Adobe Analytics. You can also export the data for updating prior to an import.
Admin > Classification Importer
The data that you import using the import tool must be in a specific format. Adobe provides you with the option to download a data template with all the proper header details in a tab-delimited data file. You can add your new data to this template and then import the data file in the browser, using FTP.
Adobe recommends that you limit the number of import and export columns to 30.
See Common Saint Upload Issues: Knowledge Base article that describes issues arising from incorrect file formats and file contents.