Within iOS 10.3, Apple is moving supported devices to its new Apple File System (APFS). It’s a file system that was originally announced at WWDC last year, and it’s designed with the iPhone ...

From the release notes: When you update to iOS 10.3, your iOS device will update its file system to Apple File System (APFS). This conversion preserves existing data on your device. However ...

If you're the type of person who immediately updates their iPhone to the latest version of iOS every time new ... Hold off a moment and back up the files on your device before the next one.

As iOS updates ... older your device, the slower the install process seems to be, with some devices taking over an hour to update. So what's going on? The answer is the new file system that ...