Google provides you with the ability to access the content in your Google Drive, even without internet access. To set this up, from a computer that is connected to the internet:
Make sure you’re signed into your Google Chrome browser.
Open Google Drive.
Click the gear icon in the upper, right corner.
Select Settings.
Check the box next to offline.
You will be able to view and edit your most recent Google Slides, Docs, and Sheets. Changes will be synced when you connect to WiFi.