If your iPhone or iPad isn’t backing up to iTunes, there are a few things you can try.
First, make sure you have the latest version of iTunes. If you don’t, download and install it.
If you’re using a USB cable to connect your device to your computer, try using a different cable. USB cables can fail for a variety of reasons, so it’s worth trying a different one.
If you’re using a wireless connection, try plugging your device into …