If you backed up to iTunes then what is listed in iTunes>Preferences>Devices?
The folder where your backup data is stored depends on the computer's operating system. Make sure the backup folder is included in your data-backup routine. iTunes places the backup files in the following places:
- Mac: ~/Library/Application Support/MobileSync/Backup/
The "~" represents your Home folder. If you don't see Library in your home folder, hold Option and click the Go menu.
- Windows XP: \Documents and Settings\(username)\Application Data\Apple Computer\MobileSync\Backup\
To quickly access the Application Data folder, click Start, and choose Run. Type %appdata% and click OK.
- Windows Vista, Windows 7, and Windows 8: \Users\(username)\AppData\Roaming\Apple Computer\MobileSync\Backup\
To quickly access the AppData folder, click Start. In the search bar, type %appdata% and press Return.
For how to restore from backup see:
iOS: Back up and restore your iOS device with iCloud or iTunes