Steps to Follow to Update Your devices running iOS 8 to iOS 9. This includes iPhones, iPads, and iPod touches. If your device is currently running iOS 8 it will be compatible with iOS 9.
It is a good practice to perform routine maintenance on your iOS device prior to an upgrade. Look over the apps you have installed and uninstall anything you haven’t used in a while or are that you are no longer interested in. Doing so frees up precious storage space and declutters your home screen.
Before doing an update, you need to backup the information currently on your device. That way if anything goes wrong, you won’t lose everything. Just because nothing has gone wrong before doesn’t mean it won’t at some time.
I digress here to tell you about something I overheard at an Apple Retail Store. A young lawyer came in to the genius bar asking for help. He had been working on a case for six months that was going to trial that week. He has his case files on his Mac, but had not backed them up even once. His hard drive died and he wanted the staff to retrieve his files, which of course, they could not do. I have often wondered if he lost his job over that.
Your iOS device can be backed up to iTunes or to iCloud – the safest way is to backup to iTunes, since it makes a full backup of everything on your device. Backups to iCloud do not include all files. I recommend backing up via a wired connection to iTunes as the safest option, but for an update of the operating system, it is prudent to backup manually right before you install the new iOS. Syncing is not the same thing as backing up.
Backup To iTunes
Connect your device to iTunes. Choose the device icon on the tool bar and click on the device you are updating.
iDevice icon found on iTunes.
iTunes will connect to the Summary page.
If you haven’t already backed up your device select Manual backup by clicking on the Back Up Now button. Once the backup is done, you can follow the directions for the installation that will included with the download.
It’s always best to choose to manually backup your iOS device rather than have it sync whenever you attach your device. Imagine that your iPhone has been acting strangely and you attach it to iTunes. If it syncs automatically – you may have just copied a software fault onto your good backup. If you’d chosen ‘manually’ – you could have delayed backing up and possibly losing your data.
Back Up with iCloud
If you have an iCloud account but don’t have access to a computer with iTunes, backing up to iCloud is your only option. The backup can be done directly from your device.
You must be connected to Wi-Fi and have your device charging. Launch the Settings app, choose iCloud, scroll down to the Backup option and tap on it. After a brief wait a Backup Now button will become active. Tap on that and the download should start. If 40 million people all decide to download the new iOS at the same time, there may be time delays after you push the Backup Now button. Generally, it will take about an hour for the update to complete and you can’t use your device during that time.