Fix iTunes error 9 - a guide

ITunes error 9 says the USB connection was lost during the transfer. This guide will tell you how to fix the problem.

Error 9 in iTunes - antivirus and firewall

If the transfer between iTunes and your iPhone is interrupted, another program may be to blame.

ITunes may be blocked by a program. First, disable your firewall and antivirus, and test if the problem is resolved. If so, you should add exceptions for both programs.
If you are using Windows Firewall, you should add an exception to Windows Firewall.
In two more practical tips, we will show you how to add exceptions under Kaspersky and Avira AntiVir. You can find information on other antivirus programs on the manufacturer's website.
After adding the exceptions, you can reactivate the programs.

If error 9 still occurs, something is wrong with the USB cable or software. Here are some tips to fix the bug:

iTunes often ejects an iPhone if it was not connected to the original cable. Simply restart iTunes and use an original cable from now on. If the problem persists, your cable may be defective.
Test if the problem also occurs on another USB port on your computer.
Alternatively, you can also synchronize data between iTunes and iPhone via WiFi.
If you have not been able to solve the problem so far, you should reinstall iTunes and restart your computer.

In this video we show you how to copy photos without iTunes.

What to do if iTunes crashes when you only connect your iPhone, read the next practical tip.