You can manually pause uploading with the Pause Uploads button found on the Home tab of the application. To resume, press the Resume Uploads button.
SpiderOak is designed to gracefully deal with network outages, so you don't need to manually pause if you are turning off your computer, or moving around and intermittently losing Internet connection. SpiderOak will pick up where it left off when it regains connection. Most people never need to manually pause a backup.
The information above is based on the current version of our application. If you are running an older version, download and install our current version, then follow the instructions above.