Where do I find my Itunes/I phone backup files on my HP

I know HOW to backup
what I do not know is where to FIND the back up file

found it
thank you
for anyone else who may not have the ti me to go digging here is what you need to know:

Where Backups are stored

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 Data\Apple Computer\MobileSync\Backup\

Windows Vista: \Users\(username)\AppData\Roaming\Apple Computer\MobileSync\Backup\