Understanding “iPhone is synced with another iTunes Library. Do you want to erase this iPhone and sync with this iTunes Library” Message
One of the most frightening iTunes messages an iPhone, iPad, or iPod user may see when they connect a device to a computer is the “The iPhone (Name) is synced with another iTunes Library on (Computer). Do you want to erase this iPhone and sync with this iTunes Library?” message, which gives you two options, to Cancel, or to “Erase and Sync” – this sounds like you’re about to erase everything on the iPhone or iPod touch completely, right? Well, it doesn’t quite work like that.
Let’s examine this iTunes alert message and understand what it means and what the resulting “Erase and Sync” action actually does.