Google Drive has replaced the online document-sharing service Google Docs entirely. Google Drive allows you to store and share movies, images, music, PDFs and Google Doc's document-collaboration capabilities. You can download the app to your tablet from Google Play.
How to use Google Drive on Nexus 7
* In the main screen, there are a few navigating options: My Drive, Shared with me, Shared, Recent and Offine. Tapping on the account name lets you quickly switch to new accounts.
* When you are viewing the files, tapping on the star located next to the item name to favorite it. Tapping on the arrow icon located on the right-hand side allows you to share, make offline viewing, sending, renaming, deleting, and opening with another app. To create a new item, tap on menu then select New to create a document, spreadsheet, document from photo, or to upload.
* From the Setting, you can set the amount of data cache size, clear cache, enable encrypt offline documents, Streaming decryption and Data usage reminder.
Links: How to view offline files in Google Drive