Using Drive Offline will let you access and modify your files even when there's no internet connection available. The changes you make while offline will be saved as soon as a connection is re-established.
Note! You can only use Drive Offline in Chrome.
Installing Drive Offline
1. Open Google Drive.
2. Click the gear icon in the up right corner and choose Settings.
3. Select Offline: Sync your work to this computer so that you can edit offline and click Done.