Problem backing up iPhone 4 before updating to iOS 5
Hi. Everybody is very nervous at this moment, and everybody is having several of troubles... all of them related to same thing: "Error 3200". But that's not happening to me. I've been trying to find an answer, but no one seems to have my problem... Well, I have downloaded my iOS 5. When I press "Update", you all will know, iTunes makes a backup of your device. So, it starts backing my iPhone 4 up, and 1 minute later, I got an error about the backup (it says -43, I don't know what it is). Then, iTunes asks me if I want to continue, but if I do, I will lose my iPhone 4 content, so, logically, I press "Cancel".
I don't really know what to do, I don't want to lose my data, but it looks like there is no other way to update. I hope someone can help me.
I don't know the exact translation in English, but it happens what I've said. If you want, here's a (Spanish) screenshot:
iPhone 4, iOS 4.3.1