![]() ![]() As you make changes it records the differences between those files, not necessarily making an entire other file and having everything copied there. You can duplicate it and it will happen instantly even though it's a huge file because it actually just stores the data once and points to the same file for both copies. So say you have a huge video file and you want to make a copy of it. There's a special thing in APFS that allows you to clone files faster. This is very optimized and should be faster for all things you need to do including even booting up your device. As you can imagine a system developed in 1998 isn't very good with handling things like solid state drive, flash memory in phones, and things like that. Well there's several different things that it brings. Now we're going to change from using this Apple Mac OS Extended format to APFS. But the native Mac format, Mac OS Extended, is the one that say your boot up drive would use and your Time Machine drive would use. That's why a lot of times you had to format a drive with a windows format so it could be read on windows and the Mac could also read that format. Now it's different than a system used say on a windows machine. It worked great and it was generally pretty fast. This was the file system used on all Macs and was also used in iOS, on the Apple Watch, and even Apple TV. So before, and for many years, Apple had a file system called Mac OS Extended or HFS+. All those details are part of the file system. It has to move them around and take care of all sorts of things like creating new files, deleting files, copying files, duplicating files. It has to know where files are, where the data for the files is kept on the drive. Now all these details are things we don't have to worry about as users. So what is a File System? Well a File System is how your computer stores files and other data on the hard drive or other storage system. It's called Apple File System or APFS for short. Video Transcript: So with the announcement of Mac OS High Sierra and iOS 11 comes a big change under the hood for all of our Apple devices. Check out What Is APFS? at YouTube for closed captioning and more options. ![]()
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