Q: What I need to do with this msg :" please change your media sync options to make more storage available"

Hi ana maria35,

If you are having issues with updating your iPhone’s software because of insufficient storage on the device, I would suggest troubleshooting using the steps in this article -

Resolve issues with an over-the-air iOS update

http://support.apple.com/kb/TS4431

Specifically -

Not enough space to update

If your device doesn't have enough space to download and install the update, you can use iTunes to update your device.

If you can't connect to iTunes, you can make room for the update by removing content on your device that you don't use. To remove content, tap Usage Settings in the Software Update screen. Learn how to see the space used by your apps and their content.

Thanks for using Apple Support Communities.

Best,

Brett L