When you try to back up your iPhone with iTunes and only get a message reads that the backup could not be saved. That frustrates much, and almost drives you mad when try and try again but keeps getting this frustrating message. Here we are going to dive into this annoying problem and try to walk you through it.
If the message is saying that you are not having enough space which I guess might be the situation easy to get solved. Just free up some space on your PC or Mac by deleting some bulky files like videos and photos.
1. Navigate to the C:\Users\USERNAME\AppData\Roaming\Apple Computer\MobileSync
2. Right click the "Backup" folder and select "properties".
3. Select the Security tab
4. Click the edit button and highlight "Everyone"
5. Check the "Full control" checkbox and hit "Apply" and then "OK"
6. Click "OK" again
Delete all your existing backups. Try to update, configure, disable, or uninstall your security software. ALL anti-virus software on your computer. Try to manually create a backup by getting your iPhone connected, and keeping iTunes running, right-click in the device pane & select "Backup".
Reset lockdown folder
For Windows 7: Choose Start, type %ProgramData% in the search bar, and press Return.
Double-click the Apple folder.
Right-click the Lockdown folder and choose Delete.
Mac OS X:
From the Finder, choose Go > Go to folder.
Type /var/db/lockdown and press Return.
Choose View > as Icons. The Finder window should show one or more files with alphanumeric file names.
In the Finder, choose Edit > Select all.
Choose File > Move to Trash. You may need to enter an administrator password.
Note: Delete the files in the Lockdown folder; don't delete the Lockdown folder.
Unplug any other devices connected to your PC or Mac than your iPhone, and make sure your iPhone is directly USB connected to your computer.
If all the above solutions don’t work for you, try to reboot your computer or simply change to another computer.