Updating ipod with itunes
In some cases you may not see the available software update message on your device then you have to update manually with the help of i Tunes application.
Backup your i OS device before updating it to the current version.
If you want to keep i Tunes from checking for the same i OS update you just stopped, you need to ignore the update.
The easiest way to do that is when the pop-up appears in i Tunes, choose the “Do not ask me again” option checkbox and do not choose to download or install it.
Frankly, it’s often faster to just download the update files directly from Apple since they are delivered through a CDN they tend to go at or near your maximum download speeds.
On a side note, if you attempted to download an i OS update from within i Tunes and it failed, you may want to trash the file it downloaded.
You need an internet connection, charge your device at least 50% or connect it to the power source and also your device must have enough storage space for the latest i OS.