Q: Syncing "other" what is this?

Hello SarahA2204,

Thanks for using Apple Support Communities.

For more information on this, take a look at:

iPhone, iPad, and iPod: Understanding capacity

http://support.apple.com/kb/HT1867

• Other: Everything else, such as contacts, calendars, messages, emails and their attachments, Safari Offline Reading List, settings, and other system resources.

Best of luck,

Mario