“macOS High Sierra introduces a new file system call Apple File System, or APFS. APFS replaces the old file system, called HFS+,” Glenn Fleishman writes for Macworld. “APFS has a lot of inherent advantages beyond just being modernized that improve reliability and speed.”
Fleishman writes, “Chances are, however, that you have external hard drives and thumb drives formatted using HFS+.”
“Apple doesn’t require that you change the file system format on external drives,” Fleishman writes, “whether attached at startup or plugged in temporarily.”
Read more in the full article here.
MacDailyNews Take: It just works. Of course, you’ll likely want to utilize APFS wherever you can for the performance and other advantages it offers.