每个 iOS 设备所有者都知道，您可以使用设备的设置快速轻松地将其备份到 iCloud 。(back it up on iCloud)但另一种备份方法是使用iTunes对您的计算机进行加密备份。
这是另一种保险单，以防备份失败，然后您的后兜里还有另一个。如果您不想使用 iCloud 或者 iCloud 中没有足够的空间来备份所有内容，这也是一个不错的选择。
缺点（对某些人来说）是您需要为此使用 iTunes，这让很多人觉得很烦人。但我实际上非常喜欢 iTunes，所以这对我来说不是问题。
首先，您的计算机是否经过授权？(First, Is Your
Computer Authorized?)
第一步是确保您要备份 iOS 设备的计算机已获得授权。出于备份的目的，一次只能在一台授权计算机上完成。
打开 iTunes 时，将 iOS 设备插入电脑。在这种情况下，我使用的是Mac计算机，但也可以在
Windows上轻松完成。这个过程几乎是相似的。
它会询问您是否要允许计算机访问手机上的信息。点击(Click)“继续(Continue)”。
同时，您的手机会询问您是否要信任计算机。说(Say)是并输入您的 iOS 密码。在您执行此操作之前，计算机将不会被“信任”并且您无法继续。
此授权将持续到您 a) 您擦除并重新格式化计算机，或 b) 您取消对计算机的授权。您可以在Mac OS X上通过转到Account –> Authorizations –> De-authorize This Computer来执行此操作。
在 iTunes 上查看您的设备(Viewing Your
Device On iTunes)
完成所有必要的授权后，您将在 iTunes 中看到您的设备。
第一个是在侧边栏中。您可以在此处将媒体文件从您的计算机拖到您的 iOS 设备上。
但备份选项远不止于此。在“音乐(Music)”下拉菜单旁边，您会看到一个设备图标。点击(Click)那个。
您现在将看到此屏幕。屏幕上还有其他部分，但这是您需要关注的唯一部分。
现在让我们暂停一下，看看这些不言自明的选项。首先(First)，在 iCloud 备份或计算机备份之间进行选择（我们今天在这里进行计算机备份）。
如果要备份账户密码、Health和Homekit数据，您需要在“加密本地备份(Encrypt local backup)”下添加密码以加密敏感数据。未能添加密码意味着此信息将不会(will not)被备份。
最后，右侧是“立即备份(Back Up Now)”。选择备份方法后（在本例中为“此计算机”），单击“立即备份(Back Up)”按钮设置滚动。
完成后，您将在“最新备份(Latest backup)”下看到刚刚执行备份的日期和时间。
查看设备备份(Viewing Device
Backups)
由于我最近才擦除并重新格式化了我的Mac，这是我目前在计算机上拥有的唯一一个 iOS 备份。但是当你有几个时，你可以在一个列表中看到它们并回滚到列出的任何一个。您还可以从该列表中手动删除备份，这使家务管理变得轻而易举。
在 macOS 上，转到iTunes –> Preferences –> Devices。在那里，您将看到您所做的所有备份以及删除选项。
How To Backup Your iOS Device Using iTunes
As every іOS devicе оwner knows, you can quickly and easily back it up on iCloud by using the device’s settings. But another way to back it up is to make an encrypted backup to your computer using iTunes.
It’s another insurance policy in case a backup fails, then you have another one in your back pocket. It’s also a good alternative if you don’t want to use iCloud or if you don’t have enough space in iCloud to backup everything.
The downside (for some people) is that you need to use iTunes
for this which many people find annoying. But I actually like iTunes a lot so
it isn’t a problem for me.
First, Is Your
Computer Authorized?
The first step is to make sure that the computer you want to
backup your iOS device on is authorized to do so. For the purposes of backing
up, it can only be done on one authorized computer at a time.
When you open iTunes, plug your iOS device into your
computer. In this case, I am using a Mac computer but it can be easily done on
Windows too. The process is virtually similar.
It will ask you if you want to allow the computer to access information on the phone. Click “Continue”.
At the same time, your phone will ask you if you want to
trust the computer. Say yes and type in your iOS passcode. Until you do this,
the computer will not be “trusted” and you can’t proceed.
This authorization will last until you either a) you wipe and reformat the computer, or b) you deauthorize the computer. You can do this on Mac OS X by going to Account–>Authorizations–>De-authorize This Computer.
Viewing Your
Device On iTunes
Once all the necessary authorizations have been taken care
of, you will then see your device in iTunes.
The first is in the sidebar. You can drag media files from
your computer to your iOS device here.
But the backup option is further up from that. Next to the “Music” drop-down menu, you will see a device icon. Click on that.
You will now see this screen. There are other parts to the
screen, but this is the only part you need to concern yourself with.
Let’s now pause for a moment and look at these options which
are self-explanatory. First, choose between an iCloud backup or a computer
backup (we’re here today to do a computer backup).
If you want to backup account passwords, Health and Homekit data, you need to add a password under “Encrypt local backup” to encrypt what will be sensitive data. Failure to add a password means this information will not be backed up.
Finally, on the right-hand side is the “Back Up Now”. Once you have chosen your backup method (in this case “This Computer”), click the “Back Up Now” button to set the ball rolling.
When it is done, you will see under “Latest backup”, the date and time of the backup you just performed.
Viewing Device
Backups
Since I only recently wiped and reformatted my Mac, this is
the one and only iOS backup I currently have on the computer. But when you have
a few, you can see them all in a list and roll back to any one of the ones
listed. You can also manually delete a backup from this list which makes
housekeeping a breeze.
On a macOS, go to iTunes–>Preferences–>Devices. There you will see all the backups you have done as well as a delete option.
