Q: why ipad crashes

Hello Ipad19732231,

Thank you for the details of the issue you are experiencing when trying to back up your iPad.  I recommend reviewing the article for the back up method you are using:

iOS: Troubleshooting backup issues in iTunes

http://support.apple.com/kb/TS2529

iCloud: Troubleshooting creating an iCloud backup

http://support.apple.com/kb/TS3992

Best,

Sheila M.

Hi Ipad19732231,

Thank you for the additional information. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://getsupport.apple.com/GetproductgroupList.action

All the best,

Sheila M.