Q: my ipod 5 wont charge, it says to connect to itunes but it wont connect it say an unknown error has occured an everything is up to date. ive had it over a little over 2 years now. Any ideas whats going on?

Do a forced restart -  After shutting down all open apps using the app switcher - invoked by quick double press of the home button and swiping up on each app till it flies off the screen.

Hold the sleep/wake and home buttons down together till you see  logo - then release and allow normal boot up

If that does not work - look in here

Get help with iOS update and restore errors - Apple Support

What was the exact wording of the error message? Usually an error number or other info is listed in addition to unknown error