Fixed: How to Solve iPhone Backup Error Reading or Writing

iTunes could used to backup and transfer iPhone data. What if you have the problem that iPhone backup error reading or writing when you restore iPhone from a previous backup? You could find the solution in this guide.


By Dylan / Updated on May 29, 2023

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There was iPhone backup error about reading or writing when I was backing up iPhone

I never had this problem before. iTunes always works for me until this problem appears. Anyone could give me some suggestions?

- Question from Apple User

iTunes Error Reading or Writing

iPhone is always around you in your daily life. The data on iPhone could be important because it is related to your life. Losing the data might let you lose the memory about a period of life so you should backup your iPhone.

Many users choose iTunes. It could be used to buy albums and movies, and also backup iPhone. The full backup created by iTunes could store most local data and setting from iPhone. When you use that backup to restore this iPhone or another iPhone, iTunes would totally rewrite the device with the data from this backup.

Sometimes iTunes would say that iTunes could not back up the iPhone because an error occurred while reading from or writing to the iPhone. This could be caused by a blocked connection or a shortage of computer storage. The following content would help you troubleshoot the problem.

Solution 1: Check iPhone to make it readable and writable

First, you should restart iPhone when iTunes tells the issue when reading from or writing to iPhone. Usually, you would find iPhone issues has been solved after you restart iPhone. This is because when system is running a command in the background, something is blocked and there is no other way to bypass it. It is like that the “bridge” is broken. When you restart the system, the “bridge” would be repaired, so it works this time.

You should use a standard USB cable. If you use the non-standard USB cable, when you update iPhone to the latest iOS, the non-standard USB cable might not support transferring data anymore. You might think that if the USB cable could be used to charge iPhone, it would also be OK when transferring data. In fact, there would be a chip in the standard USB cable, it is vitally important to build the connection between iPhone and computer.

Apple Lightning Cable

Tips: It is suggested to use standard USB cable even it works fine when connecting iPhone to computer, because Apple says that repairing the damage caused by the non-standard accessories would not be included in the after service.

Solution 2: Make your computer be trusted again

If iTunes could not read or write iPhone, something about the permission might go wrong. iPhone might be taken as a threat to computer. You could temporarily stop the antivirus on computer. Except for that, you could also try making your computer be trusted by your iPhone again.

Every time you trust the computer on iPhone, the certificate would be created in a folder called, Lockdown. You could reset the folder to grant permission to this computer again.

The location of the lockdown folder is C:\ProgramData\Apple\Lockdown. You could delete everything in this folder after disconnect iPhone from computer and quit iTunes. After that, plug the USB cable to computer again and tap “Trust” on iPhone.

iTunes Lockdown Folder

Solution 3: Make sure you have enough storage on computer

The issue about reading or writing iPhone could also be caused by the shortage of space on computer. You might wonder that there are 500GB left on your PC, so how could it be insufficient? iTunes always store your iPhone backup in C drive. If you always save data to C drive, it would be full while you are not aware of it.

How much space do you need to save a full backup of iPhone? You should know what iTunes backup includes from your iPhone. Generally, iTunes backup nearly includes the same thing as iCloud does. You could check the iCloud backup size on iPhone to estimate the iTunes backup size.

Go to iPhone Settings > [your name] > iCloud > Manage Storage > Backups > device name. You should see the estimated backup size of your iPhone. Make sure you have checked every app to get a more accurate result because iTunes would save all the app data.

Where’s your iPhone backup stored in C drive? Usually, the location would be C:\Users\[user name]\Apple\MobileSync\Backup or C:\Users\[user name]\AppData\Roaming\Apple Computer\MobileSync\Backup. If you wish, you could change the path to backup iPhone to external drive or another location on computer, but the process would be a little bit complicated if you still use iTunes.

iTunes Backup Location Windows

Alternative to iTunes to backup iPhone to PC successfully and flexibly

If iTunes keeps failing to read or write your iPhone, you could try another tool to backup your iPhone. FoneTool would be the free professional iPhone backup software recommended to you. It is very simple to use, backing up photos, videos, music, contacts, and messages from iPhone to computer.

It owns various advantages and features to meet different demands, making it to be the best choice for backup iPhone.

• Easy-to-use: It uses a simple and intuitive interface, you can backup your iPhone within a few clicks.
• Multiple backup methods: It comes with full backup that backup all iPhone data to computer. And the Custom Backup allows you to selectively backup items.
• Easily change backup location: FoneTool can easily backup any location on your computer. If you need, you can also backup iPhone to external drive on Windows.

Now, you can click the download button to install this tool. And we will show you how it works.

Download FreewareWin 11/10/8.1/8/7/XP
Secure Download

Selectively backup iPhone

Step 1. Run FoneTool, and click "Phone Backup" on the left pane. Move the mouse to "selective Backup". Click "Get Started".

custom backup

Step 2. You can select the file type to backup. And click the icon to choose the specific items.

Click Start Backup

select files

Step 3. Click "Backup Storage Path" to choose a location to save the backup, and click "Start Backup".

click backup

Backup all iPhone data

Step 1. On the main interface, choose "Phone Backup"> "Full Backup".

full backup

Step 2. Now you can encrypt and backup to backup private data. Then choose a location to save the backup files by clicking the "Backup Storage Path". Click "Start Backup".

start backup



If you have the iPhone backup error about reading or writing, this issue might be related to permission, connection, or storage. This passage gives you the solutions and if you don’t to use iTunes anymore, you could try FoneTool to easily backup your iPhone. Besides, FoneTool is a versatile backup tool with plenty of features. For example, you can transfer photos, music, videos, contacts, etc. to computer.

Does this passage solve your problem? You could share it to help more people.

Dylan · Editor
Dylan is an editor of mobile backup software. He likes to share the latest news about iPhone and iOS, write useful tips, and give solutions to help people solve all kinds of issues.