Basically, "other" is any non media content on your iPad .... App data, notes, Safari Bookmarks and history, calendar entries, text messages, contacts, and so on. It is content associated with apps but not the media itself.
You may have had a corrupt sync or have a corrupt file on the iPad and you may find out that you will ultimately need to restore the device to factory settings and rebuild the iPad in order to get rid of the bloated "other".
But before you do that, try restoring from a backup, if you have one.
How to backup and restore from a backupIf that doesn't work, try the first two fixes in this article, and you can try the third if you like, but you can make that assessment on your own.http://appchronicles.com/04/too-much-valuable-space-taken-up-by-other-category-h eres-how-to-fix-that/If none of that works, you may may have to restore the iPad to factory settings and start all over again and add all of your content back after restoring.
How Do I Get Rid Of The “Other” Data Stored On My iPad Or 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, 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.