iTunes could not backup iPhone because the iPhone disconnected

That doesn't always work, if the backup is badly currupted. That's why you need to delete the folder if this simpler method doesn't solve the problem.

I simply deleted the latest backup of my device, and it seems to have fixed up the problem perfectly! 😀

Thanks Lawrence!

Glad it worked 🙂

If you have changed the location of the itunes media folder try to reset the location to it's default. You do this in itunes preferences.

Hope it works 🙂

I've tried:

Running iTunes in Admin mode

Deleting USB Cache via device management

Renaming the backup folder

Disabling the Wifi Sync via the summary screen in itunes

reseting the itunes media folder location in the advanced section

Restarting the computer and iphone after each attempt

I'm still getting the error "... because the iphone disconnected."

Any other ideas? I'm resorting to Tipard iPhone Transfer Platinum to backup

Have you tried connecting the phone to a USB port directly on your computer, not to a hub? And if you use a front port on a desktop or tower computer either try a rear port, or make it the only device connected to the front?

Lawrence, you are clued into this problem, moving the cable to a USB port on the pack of the PC, directly connected to the PCI bridge, worked; ironically I just bought a long iphone cable. THANK YOU.

It's only my iCal that won't sync with my iPhone4 (generation 1). I have tried all of the suggested solutions--except deleting the whole backup folder--but I have restored factory settings twice. iCal is the only thing that won't sync. Can you help me? I'm running Lion on a MacBook.

Lawrence, it seems the direct attach to the computer is the answer. I've had no problems having my iPhone4 synch with my iMac until the past week (about 2 weeks after upgrading to Mtn Lion), and now this. After swapping cables, resetting the iPhone, restarting iTunes, and rebooting, still had the "can't synch" error. The minute I put the cable on the back of the iMac, everything synched just fine.

I had similar issues with a scanner that went away after plugging into the back of the iMac. But now I'm out of slots! (speakers, external hard drive, TV tuner, scanner, iPhone, external BluRay burner) I gotta use a hub! :^( I'm wondering now if I'm having a failure of the hub . . .

It's always something . . . ;^)

Thanks!

Get a good quality hub that has its own power source. Preferably one that can provide 1 amp to each port, but at least 1/2 amp.

Ironic that you just said that because I do have a highly rated HUB with its own power source and this morning for the first time it ran amuck again and said it couldn't connect to my iphone.

That's what I have - a 7-port powered Belkin hub. But I'm wondering if it's failing - it's gotta be at least 5 years old. ;^) I've never had any problems until the Mtn Lion upgrade . . .

I was geting the same error message, but I tried a different USB port on my HP laptop and that solved the problem.

My HP laptop has 4 USB ports: some USB 3.0 and 2.0.

Thanks for suggesting trying a different port.

Just wanted to add to this that I had the same issue when trying to update to iOS 6 and turning off the WiFi seemed to help.

Thanks for the assistance! 😝

Lawrence, thanks for the tip on the hub. That's what worked for me. As soon as I connected directly to my PC everything started as usual.