iPad is the most popular gadget in all over the world. You can play or watch HD movie, capture HD Video, Play high graphics game etc. It has also very large storage capacity in which you can stores thousands of songs, pictures, videos, games and many more information. In this situation it becomes necessary to keep a backup of iPad in MAC or Windows.

Is it necessary to backup/sync the iPad to iTunes?

The short iPad backup story is that Apple wants you to make your iPad backups through iTunes. And as far as I can tell, this is currently the only way to make an iPad backup.
To make an iTunes iPad backup, just follow these steps:
1.Connect your iPad to your computer,
2.Select your iPad device in iTunes, and then
3.Choose the 'Sync' option to make a backup.
You can also right-click your iPad under the itunes Devices section, and select the "Make a Backup" option from the popup menu. If you want to copy files to ipad without itunes and transfer apps to ipad, follow this guide.
That's the short story to making an iPad backup, but there's much more to learn about making iPad backups, and the iPad restore process.

Where are iPad backup files stored on my Windows computer?

The folder where your backup data is stored changes depending on the computer's operating system. Since iTunes only keeps one backup per device, you should ensure the backup folder is included in your periodic data-backup routine.
iTunes places the backup files in the following places:
•Mac: ~/Library/Application Support/MobileSync/Backup/
•Windows XP: Documents and Settings(username)Application DataApple ComputerMobileSyncBackup
•Windows Vista: Users(username)AppDataRoamingApple ComputerMobileSyncBackup

How to Restore Apple iPad Backup and delete a backup?

To restore information from a backup, use one of the following methods after connecting your iPad to the computer with which you normally sync:
•In iTunes, select the device, then select the Summary tab and click Restore (this deletes all data on iPad and restores to factory settings). When prompted by iTunes, select the option to restore your settings.
Or:
•Right-click (or Control-click) the device, and choose Restore from Backup.

If you want to delete a backup created by iTunes, follow these steps in iTunes:
1. Open iTunes Preferences:
Windows: Choose Edit > Preferences.
Mac: Choose iTunes > Preferences.
2. Click Devices (iPad does not need to be connected).
3. iTunes will show the serial number and IMEI (iPad 3G only) of the backed up iPad when you position your mouse pointer over a backup. Use this to locate the backup for the iPad you want to delete. Select the backup you want to remove and click Delete Backup.
4. Confirm you wish to remove the selected backup by clicking Delete Backup.
5. Click OK to close the iTunes Preferences Window.

Every aspect should be considered. Do I make everything clear?