Bruce Johnson5
Level 1 (15 points)

Q: iTunes could not backup iPhone because the iPhone disconnected

I've tried seaching for an answer for this problem and can't find one that works. I've tried the basics and even restored my iPhone 4S (and restarted it). Yet, I still keep getting the above message every time I try to back up even though my iPhone is hardwired to my laptop. Any other ideas out there to solve this one?

 

Thanks!

iPhone 4S

Posted on Jan 28, 2012 4:51 PM

by Lawrence Finch,Solvedanswer
Lawrence Finch Lawrence Finch
Level 8 (38,298 points)
Mac OS X
A:

the next thing I would check is the cable and connector. However, you said you had restored the phone without error, so that is not likely to be the problem.

 

It's possible that your backup is corrupted, although that usually causes the backup to hang rather than quit. You can try deleting the backup (iTunes Preferences, Devices section); this will clear the problem if the backup is corrupt. If you don't have a backup of it and don't use Time Machine you may want to just rename the backup folder instead of deleting it. It is located at ~/Library/Application Support/MobileSync/Backup/. Rename the folder at the end to Backup.sav or something similar.

Posted on Jan 28, 2012 6:04 PM

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Bruce Johnson5

Q: iTunes could not backup iPhone because the iPhone disconnected

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  • by Prasannak84,

    Prasannak84 Prasannak84 Sep 3, 2014 5:15 AM in response to Wishsathya
    Level 1 (0 points)
    Sep 3, 2014 5:15 AM in response to Wishsathya

    Hi Sathya,

     

    I found my backup at

    Disk:\userdata\<username>\Application Data\Apple Computer\MobileSync

    Using Windows 7 PC

     

    Thanks for the great information Finch!

  • by brainski,

    brainski brainski Sep 14, 2014 12:12 PM in response to Bruce Johnson5
    Level 1 (4 points)
    iPhone
    Sep 14, 2014 12:12 PM in response to Bruce Johnson5

    I was having this problem and purchased a new APPLE OEM USB Lightning cable and phone finally synced.

  • by Ryan369,

    Ryan369 Ryan369 Oct 7, 2014 3:15 PM in response to Lawrence Finch
    Level 1 (0 points)
    Oct 7, 2014 3:15 PM in response to Lawrence Finch

    Hi

    i have the same exact problem except I have never made a backup on my computer before! It won't sync, backup or update because it "disconnects" I have my iphone connected with the chargers USB cable, anything I can do?

  • by Mark Tasker,

    Mark Tasker Mark Tasker Oct 22, 2014 11:50 AM in response to Ryan369
    Level 1 (15 points)
    Oct 22, 2014 11:50 AM in response to Ryan369

    I'm having similar nightmares to some of you.

     

    I'm using an iMac on Yosemite, with iTunes 12, IOS 8 on a 4s, all up to date.

     

    The same 'disconnected' error code comes up no matter what I try right at the end of a sync / back up.

     

    I have deleted all back ups through prefs in iTunes

    I have turned off all WiFI

    I am not using a Hub or USB 3

    I have tried backing up to my Mac which I normally do

    I have tired backing up the iCloud as an alternative option

    I have tried a different cable to sync with that works on my wife's set up (same as me only Maverick / IOS 7 & iTunes 11)

     

    I can not find the MobileSync folder (perhaps Yosemite has a different folder structure?) to change the back up file.

     

    Any other ideas? I don't have a back up at all now

     

    Please Help

  • by Mark Tasker,

    Mark Tasker Mark Tasker Oct 26, 2014 4:44 AM in response to Mark Tasker
    Level 1 (15 points)
    Oct 26, 2014 4:44 AM in response to Mark Tasker

    Still no advice?

     

    Is it worth reinstalling iTunes?

     

    Does anyone know where the missing MobileSync folder would be on Yosemite?

     

    Cheers

  • by BellaTerra_QC,

    BellaTerra_QC BellaTerra_QC Nov 16, 2014 8:51 AM in response to Bruce Johnson5
    Level 1 (0 points)
    Nov 16, 2014 8:51 AM in response to Bruce Johnson5

    Got a solution !

     

    I was using a non genuine wire to connect from my computer USB to my iPod.

    Replacing it with a genuine wire from Apple solved my disconnected problem and the backup worked!

  • by Lachdanon,

    Lachdanon Lachdanon Jan 11, 2015 12:55 PM in response to Prasannak84
    Level 1 (0 points)
    Jan 11, 2015 12:55 PM in response to Prasannak84

    Huge "Thank You" goes out to Lawrence Finch.

     

    Like many others, I noticed that my iphone 5s had stopped syncing about a month ago. I am on a Windows 7 system. I renamed my backup folder as suggested and sync'd again. This time it went all the way through. One other thing I did,I also turned off my wireless on the phone and signed out of my iCloud account (I never use it anyway). and it sync'd flawlessly as others have mentioned. One last thing, my phone also automatically reattached me to the my wifi network but that's not a big deal.

     

    Thanks again Finch! =)

     

    Lach

  • by Baroona1205,

    Baroona1205 Baroona1205 Jan 31, 2015 1:01 PM in response to Bruce Johnson5
    Level 1 (0 points)
    Jan 31, 2015 1:01 PM in response to Bruce Johnson5

    I to had the same problem when I download the latest version of iTunes onto my iPhone 6 and mac and Fnch you are a legend it now works when I changed the back up folder name to backup.sav. and followed Finch's directions as follows:

    Assuming you have a Mac, launch Finder. From the Go menu choose "Go to folder" and paste

    ~/Library/Application Support/MobileSync/Backup/ into the form. Include the full string including the tilde (~).

  • by rjbokleman,

    rjbokleman rjbokleman Mar 15, 2015 7:05 AM in response to Lawrence Finch
    Level 1 (8 points)
    iPhone
    Mar 15, 2015 7:05 AM in response to Lawrence Finch

    Just had this issue this morning and found your post.  Instead of renaming the folder, I just located the GUID folder name that matched the last time my iPhone was backed up.  Deleted that sub-folder and my backups started working again!

     

    Thank You!!

  • by leosrule14,

    leosrule14 leosrule14 Mar 28, 2015 1:01 PM in response to rjbokleman
    Level 1 (0 points)
    Mar 28, 2015 1:01 PM in response to rjbokleman

    Hi All,

     

    Thanks for the various different approaches and ways by which you problem of the restoration got resolved.

     

    I faced a similar issue, where I wanted to swipe a new iPhone4 with an old one.

     

    This solved my problem:

    1. Setup the iPhone as New.
    2. Restore the Backup

  • by kearyanna,

    kearyanna kearyanna Apr 21, 2015 1:14 PM in response to Bruce Johnson5
    Level 1 (0 points)
    Apr 21, 2015 1:14 PM in response to Bruce Johnson5

    I've been having the "disconnected" pop-up message for a good 2 months now. I tried everything from using different USB hubs on my Mac to changing the USB cable time and time again. I made a backup to iCloud in the meantime, but I still wanted to be safe and have a backup of my iPhone locally on my Mac. I figured out a solution...

     

    1. Go into iTunes > Preferences > Devices.

    2. I selected the last, most recent backup from 2 months ago and deleted it.

    3. I then went back into iTunes and tried manually backing up again.

    4. It worked! No pop-up messages.

  • by buggsy2,

    buggsy2 buggsy2 May 8, 2015 5:33 PM in response to Bruce Johnson5
    Level 1 (1 points)
    May 8, 2015 5:33 PM in response to Bruce Johnson5

    I thought I'd share my experience with an iPad 3 (first Retina iPad).

     

    I tried deleting backups; no joy. Then renamed the entire iTunes directory to let it recreate it. No Joy!

     

    Finally I swapped the cable I was using for one I thought was original. Joy! Everything worked as expected.

     

    Where did I get the dodgy cable, which is useful only for charging? From Amazon; they are peddling lots of these as "Genuine OEM" and they are not. Lots of complaints over there.

     

    Why did I buy from Amazon, and not Apple? Because Apple no longer sells the 30-pin cable necessary for my older iPad. That's unfortunate because it's very difficult to find a 30-pin cable that actually works.

  • by slashusr,

    slashusr slashusr May 8, 2015 9:29 PM in response to buggsy2
    Level 1 (0 points)
    May 8, 2015 9:29 PM in response to buggsy2

    My two pence:

    I have a Renesas USB 3, 4-port hub powered from an adapter (5v, 2a) -- devices show up just fine, even launch iTunes on connection, but further than that, no joy, not even charging!. With the typical laptop two USB port problem, I bought a PCExpress card, USB 3, 4-port which takes its power off of one of my two laptop ports -- now iPad/iPhone charging just fine, no issues with backups or syncs -- until a week ago. Suddenly I'm getting "...because iPad disconnected" error message.

    So I read everything here and decided not to go through what everyone else did and just try the simplest fix -- plugged my iPad directly into the laptop port instead of the hub or PCExpress card.

    Now all OK. I don't like it, but there you are.

  • by kiwimacguy,

    kiwimacguy kiwimacguy May 17, 2015 1:21 PM in response to Lawrence Finch
    Level 1 (0 points)
    May 17, 2015 1:21 PM in response to Lawrence Finch

    Hi Lawrence.

    Can you help me with a stubborn problem backing up my 5s iPhone to my new iMac please, I'm pretty sure Ive tried just about everything, not able to copy my phone contents to Phoneview either, like iTunes it times out or eventually disconnects.

    Thanx.

    Kiwimacguy

  • by kiwimacguy,

    kiwimacguy kiwimacguy May 17, 2015 2:36 PM in response to kiwimacguy
    Level 1 (0 points)
    May 17, 2015 2:36 PM in response to kiwimacguy

    Further to above - When I try to Backup or Sync my iPhone it disconnects after an hour or so with according error message, leaving me with a (useless) partial backup or nothing at all. My last successful backup was about 6 weeks ago, which Ive now deleted, I have 40GB of data on my 60GBphone, Ive reduced that 25GB by deleting apps, vids, music and have turned off contacts, email, and notes in iCloud on my phone.

    Ive checked/tried the following to date:


    iMac and iPhone software up to date

    Reduced apps/data on phone to backup/sync

    Rebooted imac and iphone repeatedly

    Tried using different usb cables, usb ports and wifi

    Deleted all previous Backup files in Mobilesync

    Tried backing-up copying data using Phoneview up but times-out after an hour with error message -51072 which says its taking too long and suggests I sync with iTunes first.

    Downloaded and reinstalled latest iTunes app v 12.1.2.27

     

    Only thing I haven’t tried is to change my iTunes media location from External HD to iMac, which I will do next..

     

    Thanx in advance for any suggestions.

    Kiwimacguy

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