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I backed up my iPhone 4s which had loads of photographs, videos, sms and everything you would expect on a phone that has been in use for over an year. I started the update options, Once downloaded, I set up the restore from iTunes and the restore began.

Suddenly I received an error, "cannot restore this iphone as unable to save backup" I realized that I ran out of space on my drive. Once I made space and tried restoring again, contents from the backup had disappeared. The phone restores but with nothing. The normal restoration earlier took about 8-10 minutes but now it only took less than 20 seconds. Does this mean that I lost all my data, is there anyway of bringing my original back up and restore all my data. Kindly assist.

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where was the data originally? a sd card? –  Lorenzo Von Matterhorn Sep 21 '13 at 1:03
maybe im telling crap, but connect ur phone to the pc and run a recovery software on it. [this person never handled an iPhone ) -> –  Lorenzo Von Matterhorn Sep 21 '13 at 1:07
Thanks for trying to help Lorenzo but my issue seems to be that the data has gotten over written on the same back, I am looking to see if someone can suggest how I can change my backup to a previous version. For example: I backed up at 19:15 and the failed back up occurred at 22:30, now, I am looking for a way to access the backup from 19:15 which contains all the data. –  Jeewan Rajamani Sep 21 '13 at 1:33
If the data has been overwritten the it's gone –  Ramhound Sep 21 '13 at 2:21
its ok @JeewanRajamani , we're all here to lend a hand when needed, sorry i could not help more. As Ramhound says on his last comment, if it got overwritten, its gone –  Lorenzo Von Matterhorn Sep 21 '13 at 10:54

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