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It was introduced at WWDC 2016 and, starting this year, it will replace the existing HFS+ file system on Apple Watch, Apple TV, iPhone, iPad, MacBook, iMac, and Mac Pro. Apple has made a switch in the iOS 10.3 to go with a new file system (APFS). Apple is going from outdated HFS+ system to the new Apple File System (APFS) It is optimized for Flash/SSD storage and features strong encryption, also, HFS+ that has been in use since 1985, in an era of floppy disks and hard drives & when file sizes were calculated in kilobytes or megabytes. Now, Apple File System is a 64-bit file system supporting over 9 quintillion files on a single volume. The new (APFS) system is used for flash and solid-state drive storage, with a primary focus on encryption. The file system jumps to a 64-bit age, allowing for more secure storage. In today's world, people commonly store hundreds of gigabytes and access millions of files on high-speed, low-latency flash drives or an external device.