I have an ipad 2 with iOS 7. I got a notification about iOS 9 ready to install. I don't want to install iOS 9.
The problem is before this I used to have 1GB+ storage space and now I only have 100MB+ storage space left. I'm almost 100% sure the space is taken by iOS 9 install file.
In settings general usage I can see iOS 9 update but the size is only about 40MB. I have deleted it and restarted the ipad but the space recovered is only the 40MB.
Where is the rest of the install file? Can I delete it?