Q: iOS 8

Hey pariasmarcel,

Thanks for the question. After reviewing your post, it sounds like you have space take up by an update that didnt install. I would recommend that you read this article, it may be able to help you resolve or isolate the issue.

Update your iPhone, iPad, or iPod touch iOS software

Thanks for using Apple Support Communities.

Have a nice day,

Mario

Thank you for using the Apple Support Community. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://expresslane.apple.com/GetproductgroupList.action