Can't sync ipad because of wrong over capacity notice

What sync settings do you have for the other types of content e.g. have you added films to your computer's iTunes library and have 'automatically include all films' selected on the Movies tab ?

What shows on the storage bar at the bottom of the Music tab in iTunes - do the amounts taken up by music, videos, apps, photos etc roughly agree with what is shown in Settings > General > Usage, and the 'free' on that bar is similar to the amount shown in Settings > General > About > Available.

If you are stuck on that screen (if you change the music sync selection you should get a Revert button at the bottom right of the Music tab, but that doesn't seem to do much on my iTunes, it still shows as being over capacity if I click it to go back to my original selection instead of sync all music) then eject the iPad via the left-hand sidebar if you have it enabled :

Or via the top left of the screen if you don't have the sidebar enabled :

And then reconnect it and retry

How big is the difference between what shows as free on that bar and in Settings on your iPad before you try and select the music that you want to sync ? And what are you trying to select on the Music tab for syncing - just an extra album or two, or all of your computer's iTunes music ?

What videos, and space taken up by videos, show in Settings > General > Usage > Videos ? If you've been streaming films and/or TV shows from the cloud then they might be taking up space and show there - if they do then you can delete them from there

iPhone, iPad, and iPod: Understanding capacity

http://support.apple.com/kb/ht1867

How much space is used by your Other? You may be able to reduce.

How Do I Get Rid Of The “Other” Data Stored On My iPad Or iPhone?

http://tinyurl.com/85w6xwn

How to Remove “Other” Data from iPhone, iPad and iPod Touch

http://www.igeeksblog.com/how-to-remove-other-data-from-iphone/

With an iOS device, the “Other” space in iTunes is used to store things like documents, settings, caches, and a few other important items. If you sync lots of documents to apps like GoodReader, DropCopy, or anything else that reads external files, your storage use can skyrocket. With iOS 5/6/7, you can see exactly which applications are taking up the most space. Just head to Settings > General > Usage, and tap the button labeled Show All Apps. The storage section will show you the app and how much storage space it is taking up. Tap on the app name to get a description of the additional storage space being used by the app’s documents and data. You can remove the storage-hogging application and all of its data directly from this screen, or manually remove the data by opening the app. Some applications, especially those designed by Apple, will allow you to remove stored data by swiping from left to right on the item to reveal a Delete button.

What is “Other” and What Can I Do About It?

https://discussions.apple.com/docs/DOC-5142

iPhone or iPad Ran Out of Storage Space? Here’s How to Make Space Available Quickly

http://osxdaily.com/2012/06/02/iphone-ipad-ran-out-of-available-storage-space-ho w-to-fix-quick/

6 Tips to Free Up Tons of Storage Space on iPad, iPhone, and iPod Touch

http://osxdaily.com/2012/04/24/6-tips-free-up-storage-space-ipad-iphone-ipod-tou ch/

Also,

How to Clear Message/iMessage Cache on iPhone & iPad And Reclaim Lots of Free Space

http://www.igeeksblog.com/how-to-clear-message-imessage-cache-on-iphone-ipad/

What is Stored in iCloud and What is Not

https://sites.google.com/site/appleclubfhs/support/advice-and-articles/what-is-s tored-in-icloud

 Cheers, Tom 😉