Go to File> Work in Offline Mode
This is where you will not need any internet connection at all in order to work or export SVG files.
Trouble Shooting Photos: If you're not seeing any photos...
It's best to get a complete update of offline photos. You can do this by going to Help> Update Offline Photos.
Select the categories and click Download
Here you can choose which categories to download. It is recommended that you simple download all in order to make sure that you have everything.