Trying to update iPhone to iOS7 on new computer?

I just got this computer and never hooked up my iPhone 4 with it. I'm pretty sure I just uploaded all my files from the phone to the computer, now it's saying on the phone that I have to plug it back to iTunes, and when I do that it says "must restore and update." But when I press restore, it says I have to erase all my files, but after it I can restore all me memory back onto it. What's going on? What should I do?

Do not update iPhone 4 to iOS 7… It sucks and very very slow… You will regret.getting your data back is the least of your problem.

stay away from iOS 7 on iPhone 4.

Assuming it's still working as per normal:

Once you plugged your iPhone 4 in, it should show up on your iTunes as "Maddie's iPhone"

Right click that and select "Back up device"

IF you wish to find out if there's a back up already, go to "Edit --> Preferences -> Devices tab --> see if you have a device backup file"

If you do, you're fine to go ahead with restoring your phone.

Once the restore is done, it will ask you if you want to restore from back up or as a new device. Choose restore from back up.

Your phone should be ready with iOS7 in about 30mins-1.5hrs.

Edit: it will have to erase the files on your phone to perform the upgrade. If you have a device backup on the computer already you're good to go.

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