Error Syncing iPhone 4S

Phone: iPhone 4S iOS 6 (error was with previous software, too)
iTunes: Latest software (occurred with previous editions)
Problem:
When I attempt to sync my phone to my laptop I get the following error:
"iTunes could not back up the iPhone.... because the backup was corrupt or not compatible with the iPhone. Delete the backup for this iPhone then try again"
It used to backup (I've had the phone for about 6 months); I"ve stored .pdfs in iBooks and that's about it.
Question(s):
Has anyone else had this error?
How did you solve it?
Where are the backup files stored?
Any assistance would be appreciated.

Both my husband and I had this same thing happen to us -both of us got the same error message every time we tried to backup and update our phones. I deleted my last backup as it requested & then I noticed that an old backup from and old phone (not even an iPhone) was being stored in iTunes so I deleted that one too, then backed up my phone and updated the iOS. I was able to backup and update my husband's phone without deleting his last back up so I think the old backup from the old phone was hindering something.

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Hi,
Try deleting the iPod photo Cache folder, which is in the folder photos are synced from. This article: http://support.apple.com/kb/TS1314 provides more details about the folder.
Also, make sure the iPhone is directly connected to the Mac, using the cable that came with it.
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Hello lenmin,
Thanks for using Apple Support Communities.
To help resolve this issue where you're repeatedly prompted to authorize with your Apple ID in iTunes when syncing, please follow the directions in the article below.
iTunes: Missing folder or incorrect permissions may prevent authorization - Apple Support
Have a great weekend,
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Try TS1389: iTunes repeatedly prompts to authorize computer to play iTunes Store purchases.
tt2

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I've done a bit of googling and didn't find anything that helped.
I have tried:
- resetting the iPhone
- rebooting the OS
- the disabling power save on the USB
- installing a new version of iTunes (9.0.3.15)
- installing iTunes over itself (9.0.3.15)
- installing an older version of iTunes (9.0.0.70)
The error occurs at the last stage, where iTunes says " Syncing "iPhone <name>" ".
Phone was previously sync'd with my iTunes in XP before going to 7. I did choose to sync only with the new 7 system.
The phone charges fine, and I can pull pictures off of it via Windows.
Ideas?
Message was edited by: jollyman78

Jollyman,
to sync your photos, you have a few options.
If you have your TOP iTunes page set to "automatically" sync when logged on, it will search for the photos folder in your iTunes folder on your PC. If you have nothing in there, nothing will come out and whatever is already on your device will be synced to 'nothing' in you folder.
I find it more useful to checkmark on the top iTunes page "manage music and photos manually". This will give you a little bit more control of where and which photos/in which folder on your PC you wish to update/sync.
Once you've checkmarked it, you'll see a pop-up..."are you sure etc...it will erase blah blah blah". Click YES and APPLY (important).
Now when you click in the left sidebar on your device's name (iPod, iPhone...whatever), click on the icon itself to take you to your device's homepage. In the top menu choose PHOTOS and choose in the dropdown menu the folder where you wish to keep ALL your pics/320x480-Images/Photos/ETC. that you have made your DESTINATION folder for UPDATES. This is important, because every time you'll sync your hardware, iTunes will search for that folder to locate any new updates/additions to that folder and considers it an update/sync. So make sure you always have ALL the things in that folder that you wish to see on your iPhone/iPod or whatever you are trying to update/sync.

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I have iPhone 5 with iOS 6.1.4 and iMac with Mavericks 10.9.3 and iTunes 11.2.1.
I also got this error when I tried to sync iPhone with iMac (after a year when Apple disabled local USB cabel sync in Mavericks - thanks Apple for re-enabling it!).
I tried a number of things to no avail. Finally I tried three things - and hurraaa, can sync now! Unfortunatelly I didn't test sync among these three steps - so don't know which one fixed it - up to you to try. My guess is that it was the 3rd step, actually
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Step 2: On the list of Calendars I had one custom item (Birthday in my local language). This item had only one entry in it. I deleted both the single entry and the custom item as a whole - so I left the default categories only.
Step 3: At the top of the list of Calendars there is an item "All from My Mac". I tapped this and thus enabled all of my calendar categories. Now the sync worked like a charm!
I actually noticed that when I synced, iTunes automatically checked all items under "Sync Calendars - Selected Calendars". Even if I manually deselected all except the "Home" calendar, as soon as I started to sync, iTunes checked all items automatically. This led me to thinking that if I check "All from My Mac" item in my iPhone it might work.
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ERROR MESSAGES WHILE SYNCING IPHONE 3GS WITH ITUNES 11.0.1

ERROR MESSAGES WHILE SYNCING IPHONE 3GS WITH ITUNES 11.0.1
I just upgraded to iTunes 11.0.1 and although my music, podcast and apps sync with my iPhone 3GS (Version 4.1), iCal and Address Book doesn't! I get the following error messages:
After clicking OK, another dialog box appears that states:
Also, iSync has this to say:
Until the upgrade, I had no problems syncing my iPhone 3GS with iTunes!
How can I correct this new issue?
Thank you very much in advance,
David Sampson.

Mmmmmm how strange.... have just closed and reopened and problem seems to have cleared.....

HT1414 I have iphone 4; tried to sync it said I need to update software so I clicked ok - it then said I need to restore and did above got to stage 3, clicked restore and update, but it comes up with an error saying iphone cannot be found Please help!!!

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Dear Jody..jone5
Good for you that can't update your iphone because I did it and my iphone dosen't work for example I can't download any app like Wecaht or Twitter..
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Atousa

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Doublechecking something Emcee. I see you've got Windows 7 x64, so I'm assuming you've got at least 4 GB of RAM. Do you also have an NVIDIA USB EHCI chipset on that PC? If so, see the following Microsoft document:
[You encounter problems when you move data over USB from a Windows 7 or Windows Server 2008 R2-based computer that has an NVIDIA USB EHCI chipset and at least 4GB of RAM|http://support.microsoft.com/kb/976972]

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My iPhone still has over 5GB of free memory, my computer has 3GB of RAM, and my hard drive has 36GB of free space. Which "memory" is lacking? I suspect this is a bug in iTunes 9.1.0.79.
Anyone else out there with the same problem? Or perhaps any suggestions?
Thanks.
Here is a log from the iPCU (hint, hint, any Apple techies reading this):
Fri Apr 9 01:32:05 unknown SpringBoard[24] <Notice>: MultitouchHID(208b30) uilock state: 1 -> 0
Fri Apr 9 01:32:05 unknown SpringBoard[24] <Notice>: MultitouchHID(376f330) device bootloaded
Fri Apr 9 01:32:13 unknown SpringBoard[24] <Notice>: MultitouchHID(208b30) uilock state: 0 -> 1
Fri Apr 9 01:32:19 unknown SpringBoard[24] <Warning>: SB SYNC: iTunesSyncRequestedStart 0
Fri Apr 9 01:32:19 unknown SpringBoard[24] <Warning>: SB SYNC: beginSyncing 1
Fri Apr 9 01:32:19 unknown SpringBoard[24] <Notice>: MultitouchHID(208b30) uilock state: 1 -> 0
Fri Apr 9 01:32:19 unknown SpringBoard[24] <Warning>: SB SYNC: didShowSyncPanel 2
Fri Apr 9 01:32:19 unknown SpringBoard[24] <Warning>: SB SYNC: _notifyAppsSyncWillBegin 2
Fri Apr 9 01:32:19 unknown SpringBoard[24] <Notice>: MultitouchHID(376f330) device bootloaded
Fri Apr 9 01:32:24 unknown misagent[1634] <Error>: profile not valid: 0xe8008011
Fri Apr 9 01:32:29 unknown BackupAgent[1640] <Warning>: BackupAgent starting up...
Fri Apr 9 01:32:29 unknown BackupAgent[1640] <Warning>: Backup session starting
Fri Apr 9 01:34:52 unknown com.apple.mobile.lockdown[16] <Notice>: receive secure message timeout!
Fri Apr 9 01:34:52 unknown lockdownd[16] <Error>: (0x83e800) handle_connection: Could not receive USB message #8 from unknown. Killing connection
Fri Apr 9 01:34:59 unknown SpringBoard[24] <Warning>: SB SYNC: iTunesSyncHasCompleted 2
Fri Apr 9 01:34:59 unknown SpringBoard[24] <Warning>: SB SYNC: didEndSyncing 5
Fri Apr 9 01:35:00 unknown SpringBoard[24] <Warning>: ITDBPrepServerPostProcessRun: [BEGIN] looking up itdbprepserver.
Fri Apr 9 01:35:00 unknown itdbprepserver[1657] <Warning>: starting up.
Fri Apr 9 01:35:00 unknown itdbprepserver[1657] <Warning>: acquired iTunes sync file lock.
Fri Apr 9 01:35:00 unknown itdbprepserver[1657] <Warning>: acquired itdbprep file lock.
Fri Apr 9 01:35:00 unknown itdbprepserver[1657] <Warning>: posting com.apple.itdbprep.notification.willBegin
Fri Apr 9 01:35:00 unknown SpringBoard[24] <Warning>: ITDBPrepServerPostProcessRun: [-END-] looking up itdbprepserver. success = 1
Fri Apr 9 01:35:01 unknown itdbprepserver[1657] <Warning>: BEGIN processing command: com.apple.itdprep.command.runPostProcess
Fri Apr 9 01:35:01 unknown itdbprepserver[1657] <Warning>: [BEGIN] ITDBPostProcessController...
Fri Apr 9 01:35:01 unknown com.apple.itdbprep.server[1657] <Notice>: warning: Could not compile statement SELECT value FROM _SqliteDatabaseProperties WHERE key = ?;: no such table: _SqliteDatabaseProperties
Fri Apr 9 01:35:01 unknown com.apple.itdbprep.server[1657] <Notice>: warning: Could not compile statement SELECT value FROM _SqliteDatabaseProperties WHERE key = ?;: no such table: _SqliteDatabaseProperties
Fri Apr 9 01:35:01 unknown com.apple.itdbprep.server[1657] <Notice>: warning: Could not compile statement SELECT value FROM _SqliteDatabaseProperties WHERE key = ?;: no such table: _SqliteDatabaseProperties
Fri Apr 9 01:35:02 unknown itdbprepserver[1657] <Warning>: [BEGIN] Post Processing...
Fri Apr 9 01:35:02 unknown itdbprepserver[1657] <Warning>: Skipping iTunes Commands.
Fri Apr 9 01:35:02 unknown itdbprepserver[1657] <Warning>: Running Misc Commands...
Fri Apr 9 01:35:02 unknown itdbprepserver[1657] <Warning>: Running Sorting Process...
Fri Apr 9 01:35:08 unknown SpringBoard[24] <Notice>: MultitouchHID(208b30) uilock state: 0 -> 1
Fri Apr 9 01:35:12 unknown itdbprepserver[1657] <Warning>: Running Create Triggers...
Fri Apr 9 01:35:12 unknown itdbprepserver[1657] <Warning>: [-END-] Post Processing.\n\nStats\n\ttotalMLSITDBPostProcessing=10.10s\n\tcommands=0.01\n\tm isc=0.54s\n\ticuSort=9.11s (MLSicudata=1.07s, MLSicu_secdata=0.34, dropIdx=0.05, normalize=0.55, update_orders=4.02, tStatsICUOther1=0.02, createIndex=4.06)\n\n
Fri Apr 9 01:35:42 unknown itdbprepserver[1657] <Warning>: * STARTING: DB Backup (CREATE-NEW) *
Fri Apr 9 01:35:42 unknown com.apple.itdbprep.server[1657] <Notice>: warning: Could not compile statement INSERT INTO itemtocontainer (item_pid, container_pid) SELECT item.pid, ? FROM item WHERE (((item.media_kind & ?) OR (item.media_kind & ?)) AND ((item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)) OR (item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)) OR (item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)) OR (item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)) OR (item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)) OR (item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)) OR (item.genre_id = (IFNULL(SELECT genre_map.id FROM genre_map WHERE genre_map.genre, '') COLLATE ML3SearchCollation = ?)))): near "SELECT": syntax error
Fri Apr 9 01:35:43 unknown itdbprepserver[1657] <Warning>: * FINISHED: DB Backup (CREATE-NEW, time = 1.60s) *
Fri Apr 9 01:35:43 unknown itdbprepserver[1657] <Warning>: Initializing MusicLibrary
Fri Apr 9 01:35:44 unknown itdbprepserver[1657] <Warning>: [-END-] ITDBPostProcessController.\n\nStats\n\ttotalTime=43.34s\n\tensureIndices=23.58\ n
Fri Apr 9 01:35:44 unknown itdbprepserver[1657] <Warning>: DONE processing command: com.apple.itdprep.command.runPostProcess
Fri Apr 9 01:35:45 unknown itdbprepserver[1657] <Warning>: posting com.apple.itdbprep.notification.didEnd
Fri Apr 9 01:35:45 unknown itdbprepserver[1657] <Warning>: Releasing locks.
Fri Apr 9 01:35:45 unknown itdbprepserver[1657] <Warning>: exiting now.

The problem continues with the recent update to iTunes v. 9.1.1.12.
The last version which worked perfectly was 9.0.3
Please advise.

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Error 9006 on the apple site says "
Error 9006: Following Troubleshooting security software frequently resolves this error. There may be third-party software installed that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your Registry. Your default packet size being set incorrectly can cause this error. Contact the manufacturer of the software that installed the packet size modification for assistance."

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