New answers tagged storage
Photos in both places will consume storage space on your device, since they are stored on your device regardless of location. To free the most amount of space, remove photos from both Photo Stream and your Camera Roll.
Keep in mind that you don't start with 16GB, but 16 x (1,000 x 1,000 x 1,000) ÷ (1024 x 1024 x 1024), or roughly 14.9 GB. So, the OS itself is only using up around 1.5GB.
I'd say that's normal, my own 16GB iPhone 5 is adding up to 13.3 GB of available space. I would assume that the other space would be taken up by iOS itself, with system files, libraries etc. Also, as Kent mentions, the actual space is not 16GB to begin with.
No - not directly, iCloud is not general purpose storage like Amazon S3 or Dropbox offers where you can push files to the store and then delete them and transfer back. Yes - indirectly, you could ensure your iCloud backup holds everything you care about, turn off backups, delete enough things to run the update and then immediately erase all content and ...
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