On an i Pad mini with Retina Display, one warning said 6.9 GB.While the operating system itself is about a 1-gigabyte download (which is pretty big), your device needs even more breathing room to perform the update.
Reports vary, but on an i Pad 3, for example, you need at least 5.8 GB of free space.
The update will not happen if you have less than that.
Using Your i Phone, i Pad, or i Pod Using i Tunes Community Q&A Apple releases frequent updates for the i Phone, i Pad, and i Pod touch.
These updates range from small security updates to full-blown revisions of the operating system.
Everything you love is now even better with i OS 10, our biggest release yet. Apps can now extend to Messages, Siri, and Maps to provide more engaging functionality.
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As of Wednesday, it looks like a 30- to 50-minute download for the update file that way.
Downloading the update file over Wi Fi to your i Phone or i Pad generally takes longer.
While you’re downloading the i OS 8 installer, you can keep using your phone or tablet.