Ipad 3rd Generation Update To Ios 12. IOS and iPadOS 14 macOS Big Sur and watchOS 7. It also supports latest iOS 121 and latest iPhoneiPad and iPad touch.
Anything newer will run the latest version of iOS as of 41820. If not enough space is available your device will offer to temporarily remove apps to make space. If it is a 4th generation you can update to iOS version 1034.
To update do the following.
Unlike iOS 11 before it which did drop support for some devices iOS 12 supports the same iOS devices as its predecessor. Specifically iOS 12 supports the iPhone 5s and later all iPad Air and iPad Pro models iPad 5th generation iPad 6th generation iPad mini 2 and later and iPod touch 6th generation models. All iOS system problems are covered by Fixppo including iOS. 6 are the last supported versions.