APFS has strong encryption and features space sharing, snapshots, and improved file system fundamentals. APFS is optimized for SSD storage that’s used in recent Mac computers, but it also supports older, traditional hard disk drives (HDD) and externally attached storage. Apple File System (APFS) – By default, all Macs with macOS 10.13 or later use the Apple File System (APFS) partition type.Apple directly supports three partition types: Apple File System (APFS), Mac OS Extended (HFS+), and MS-DOS (FAT)\ExFAT.
Partition types, also known as file systems, dictate how your hard drive handles your data.