Level 1

32 points

Iphone disconnected problem during backup

I have a problem when I am trying to make a backup of my Iphone 7 and iTunes via USB cable - Iphone disconnected problem - "iTunes could not back up the iPhone because the iPhone disconnected". I cannot backup to my computer. In the same time, Wi-fi backuping to iCloud was completed succesfully.

I am using latest iOS 10.3.3 and Windows 10x64 (version 1703, build 15063.483) with all updates and latest iTunes 12.6.2.20 and good ASUS motheboard with good powerful USB 3.0 porrts and original Apple USB-ligtning cables.

I tried to use 3 different cable and 4 different USB ports, with no result.

I tried to reinstall everything, I stopped antivirus, activated "At the Plane" mode, and made all other tricks which I found here, with no result.

I had this error with previous versions of iOS and iTunes as well, but when I had iPhone 5, I did not have this error on the same desktop computer.

iPhone 7, iOS 10.3.3, Iphone 7

Posted on Jul 23, 2017 7:18 AM

Top-ranking reply

Illydth

Level 1

9 points

Posted on Sep 18, 2017 9:34 PM

THIS IS THE REAL DEAL.

This is the issue...at least it was for me. And it makes sense:

* Why do some people get this and others don't despite the same OS?

--> Not everyone has Non-ASCII characters on their Filesystem.

* Why do some devices have this issue and others don't despite being owned by the same person?

--> Not all exact content is on all devices.

* Why is this fixed for some people by "deleting their largest apps" but not for others?

--> Because the larger the app, the more data that app stores, meaning the more likely that data is to hold a character that will corrupt the backup.

To be clear:

Using iMazing - The FREE Version (not a promotion) - I backed up my iPad via the software with the console open and with a search string of "No operation found for path"

The moment the backup broke iMazing's console showed me this exact path and I noticed that an e-book had an author's name with an accented "a" character in the title.

I went into my e-book software, renamed each e-book by that author to remove the accent "a" and replaced it with a normal "a", and re-ran a backup.

My iPad now backs up without a hitch.

Again:

* I did not delete any programs.

* I did not delete any data

* I did not reinstall any applications.

* I did not have to back up with Airplane mode or reset network settings or any other of the many "fixes" for this problem.

* The ONLY thing touched during this entire process was to remove the Accented Character from book titles through renaming.

I will re-link the document that everyone needs to pay attention to here:

https://imazing.com/blog/ios-10-3-3-device-disconnected-error-during-backup-fix

This solved my problem, your mileage may vary. That said, if your device is failing backup at about the same place every time it backs up, and you've tried on multiple computers and with multiple cables, there is a HIGH likelyhood this is a fix...

This is not a hoax, this is no joke, this is the real deal.

Massive Kudos to iMazing and those who tracked down this issue.

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105 replies

gedonis Author

Level 1

32 points

Jul 23, 2017 8:52 AM in response to Lawrence Finch

When I am hearing about "lucky" or "unlucky", I am imaging casino or lottery ticket. Yes, I like lotteries and spend 2 dollars, maybe 10 dollars for a ticket. But I do not visit casinos and I do not like spending 749 bucks for the ticket, sorry, a device which has characteristics of the lottery ticket.

benso888

Level 1

20 points

Jul 23, 2017 10:29 PM in response to gedonis

I am trying to find out workaround for this. This issue is not happened in iOS 10.3.2. My iOS 10.3.2 devices work fine in backup without error. Only in iOS 10.3.3 heavy-use user will face this issue. After test success, will post in here.

Squiddz

Level 1

78 points

Jul 24, 2017 12:38 PM in response to eugchem

Even though I am using a Mac, I have the same problem with my iPhone 6 since the 10.3.3 update. My 2 iPads are also updated and they have no problem backing up. I have tried everything with my phone and I have posted over in the Mac thread on this issue. Just wanted to let you know I'm one of the "unlucky" ones too.

benso888

Level 1

20 points

Jul 24, 2017 5:03 PM in response to eugchem

This is a bug related to iOS 10.3.3 and Apps. That make itune show iphone disconnected during backup. After doing workaround, all my iOS 10.3.3 devices can backup completely now. Some iOS 10.3.2 still backup complete. Some of my frequent using apps with this issue contains feature not perform itune backup. After activiate, this issue will resolve. If not possible, I need to remove it then itune backup can finish.

eugchem

Level 1

4 points

Jul 25, 2017 3:29 AM in response to benso888

I agree with gedonis that this workaround with the max filesize does not work, at least for my iphone, as I do not have any app > 700MB anymore (removed anything above) and still have this backup disconnection bug... benso888 could you be so kind and provide us more details on what files you removed and what is now your max filesize?

Squiddz

Level 1

78 points

Jul 30, 2017 7:14 AM in response to dcook1967

Not me, still having the issue. Since there are many of us with the same problem, I'm assuming (hoping) Apple will fix it in the next incremental update. My iPads both back up to my Mac just fine - same USB port and cable. So it's an issue (for me) with the phone only. I've also reported it to Apple directly. Fingers crossed!

nick_95

Level 1

4 points

Aug 2, 2017 8:29 AM in response to gedonis

I had this same problem and absolutely nothing worked.

However I saw something about switching off wifi and backing up, and so I turned off wifi on the iPhone and the backup worked.

Since then I've backed up with wifi back on it now works fine. Hope this works for you if you haven't found a solution yet!

Squiddz

Level 1

78 points

Aug 2, 2017 8:48 AM in response to nick_95

Unfortunately this made no difference for my phone. I shut off wifi & tried to backup with my USB cable as usual, and I got the same error. I can't backup to iCloud either. Glad it helped someone else though! Waiting patiently for the next iOs update!

Demo

Level 10

167,493 points

Aug 2, 2017 8:48 AM in response to nick_95

nick_95 wrote:

I had this same problem and absolutely nothing worked.

However I saw something about switching off wifi and backing up, and so I turned off wifi on the iPhone and the backup worked.

Since then I've backed up with wifi back on it now works fine. Hope this works for you if you haven't found a solution yet!

I have experience this on my wife's iPhone recently. I have only been using WiFi for her backup. I haven tried using the cable.

Were you trying to update over WiFi originally when you got the message or were you using the cable all along, but just turned WiFi off and then had success using the cable?

tero70

Level 1

8 points

Aug 4, 2017 7:18 PM in response to gedonis

I have this exact backup problem with my iPhone 6s plus too, and the same error occurs when trying to backup to either my PC or laptop so I guess it is not a corrupt backup issue or an iTunes issue . It appeared only after updating to iOS 10.3.3. Reading about the possible relation to big app data, I deleted all apps with large amount of user data. I could backup the phone, but when I reinstalled a document reader "Goodreader" and my large pdf library the problem returned.

tero70

Level 1

8 points

Aug 4, 2017 8:34 PM in response to tero70

I have now checked...the problem is not related to the size of the app but to the app itself. The iTunes returns that error once the Goodreader app is installed...I just want to point out that the app works perfectly but just wouldn't allow the phone to backup.

benso888

Level 1

20 points

Aug 4, 2017 8:50 PM in response to benso888

There is supplement that Apps provide container function. e.g. goodreader / file explorer/ media player etc app. Please try to use case 2+3 to resolve it. If App can provide stop itune backup function, please use it. Then itune backup can be done

Aug 5, 2017 7:09 AM in response to tero70

That's very useful information. It's likely that the goodreader database is corrupt, and the backup process can't read it. I don't know if it is just the database on your device, or if all goodreader databases are affected. This can be tested by deleting the app, restarting the phone, then adding the app back. It should create a new empty database if you do that.

tero70

Level 1

8 points

Aug 5, 2017 7:18 AM in response to Lawrence Finch

I already did that.... no.... it is just the installed app without any data

that is causing the problem...... and maybe this app is just an example for

other apps that in someway have become incompatible with backup when the

iOS was updated

On Sat, Aug 5, 2017 at 4:09 PM Apple Support Communities Updates <

Squiddz

Level 1

78 points

Aug 5, 2017 7:21 AM in response to tero70

That is possible, I would guess, but for me it makes little sense because I have (mostly) the same apps on my phone and iPads. All on the same version of iOs and only my phone won't back up. My iPads back up fine.

Ok, I'll stop now & try to wait patiently for Apple to fix this!

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Iphone disconnected problem during backup