On mobile devices, you can make objects available off-line by downloading the objects from the server to your mobile device. All object changes are synchronized as soon as the objects are available off-line.
How to make single objects available off-line on mobile devices:
In the Drive app, tap the menu icon. Select All files or another suitable view.
Browse the files and folders list to the wanted object.
Tap the menu icon next to the object.
Enable the menu item Available offline.
Tip: To only view the objects that are available off-line, tap the menu icon. Select Offline.