How much data use for latest ipad update
HOw much data will my ipad use to download the latest update
iPad 2, To download 8.1
Your post above says "To download 8.1". However, iOS 8.1 is far from the latest update.
Downloading the latest update, iOS 8.1.3, takes about 50 or 60 megabytes assuming you start with iOS 8.1.2.