restore backup... error reading from or writing to

I would try to keep things simple. E.g. move the copied data so it is at say D:\Apple\MobileSync\Backup.

From what you say the original folder is at C:\Users\<User>\Apple\MobileSync\Backup correct? Since you've copied the data you can rename the folder Backup to say Backup2 temporarily. It is going to be deleted, but let's do the redirection first.

For this you need to find the command prompt item in your start menu. Right-click on it and use Run as administrator. Select and copy the following text:

MkLink /J "C:\Users\<User>\Apple\MobileSync\Backup" "D:\Apple\MobileSync\Backup"

Click the small black rectangle at the top left of the command prompt and click Edit > Paste. User the cursor keys to go back to the text <user>, delete it, and replace with your profile name, then press Enter.

If you now look inside the folder C:\Users\<User>\Apple\MobileSync you will see a new folder called Backup with a slightly different icon. Click on this and you should see the folders inside which are actually stored on D:.

Launch iTunes and make sure that it can still see the backups listed under Edit > Preferences > Devices.

Assuming all is well you should now be able to delete the Backup2 folder and empty the recycle bin to free up space.

Now try restoring your backup once more.

tt2

I believe the first step of the restore is to make a copy of the backup that is being restored. See Relocate iOS device backups for a way to move this data out to another drive. Review the rest of the Make a split library portable user tip for advice on organizing the library on external storage.

tt2

Yes, although if your device isn't working properly and you want to restore it then that might be best done on the machine you already manage it with. If you're moving your library to a new machine you don't generally need to worry about moving the backup too. Just take a fresh backup on the new machine. See Move your iTunes library to a new computer for more.

tt2

To confirm from the original post, you're running Windows 10 and it is up to date?

Do you already have a secondary drive with enough room for your existing backup folder at <SystemDrive>\Users\<User>\AppData\Roaming\Apple Computer\MobileSync\Backup and another 60Gb that is likely to be needed as part of the restore? If yes, what is the drive letter?

tt2

You're welcome. 🙂

tt2

can i use external HDD to copying the backup file from C:\Users\<User>\Apple\MobileSync\Backup and restored via iTunes in windows 10?

thanks