APFS is coming soon: iOS 10.3 will automatically upgrade your filesystem

After many years and at least one false start, Apple announced at WWDC last year that it would begin shipping a new, modern file system in 2017. Dubbed APFS (for Apple File System), it is designed to improve support for solid-state storage and encryption and to safeguard data integrity. When released, it will finally replace the nearly two-decade-old HFS+ filesystem that Apple has been tacking new features onto since 1998.