I've been searching for other threads to avoid duplication but I didn't seem to find anybody that has as extreme problem as I do. Device: 3GS 32GB w/16GB data, >1GB apps and >1GB photos, the rest music/video. Computer: Core 2 duo, 2GB RAM. Problem: I started the iOS4 upgrade Monday morning and incurred a problem with the pre-install backup sync the device needs to perform before upgrading. To resolve this I read on Apple's website that I had to dump the old backup file thus creating a fresh backup file. However, the backup so far has been extremely slow. I've been syncing now for nearly two days straight and the status bar isn't even half way complete. I've cancelled and restarted a couple times to troubleshoot variables (restarted computer, restarted iphone, etc) and nothing helps speed it up. There's no way it takes four days to transfer 16GB of data via usb 2.0. To put things in perspective, I uploaded about 75GB of data on my other computer to my online backup service in less than a day. Anyone else familiar with this problem or know of something I'm missing? Thanks!