You can update iPad software in Settings, or by using iTunes. You can also erase iPad, and then use iCloud or iTunes to restore a backup.
Deleted data is no longer accessible through the iPad user interface, but it isn't erased from iPad.
You can update iPad software in Settings or by using iTunes.
Update wirelessly on iPad. Go to Settings > General > Software Update. iPad checks for available software updates.
Update software in iTunes. iTunes checks for available software updates each time you sync iPad using iTunes.
For more information about updating iPad software, see support.apple.com/kb/HT4623.
You can use iCloud or iTunes to restore iPad from a backup.
Restore from an iCloud backup. Reset iPad to erase all settings and information. Sign in to iCloud and choose Restore from a Backup in the Setup Assistant.
Restore from an iTunes backup. Connect iPad to the computer you normally sync with, select iPad in the iTunes window, and click Restore in the Summary pane.
When the iPad software is restored, you can either set it up as a new iPad, or restore your music, videos, app data, and other content from a backup.
For more information about restoring iPad software, see support.apple.com/kb/HT1414.