Transfer to APFS file system: iOS 10.3 for iPhone disguised storage space

Previously, entry-level iPhone users always complained about the amount of available storage reserved. But with the release of the iOS 10.3 update, everyone found that Apple has released a few GB of free space. According to the foreign media editor Apple Insider, the "release volume" of the iPhone 7 Plus reached 7.81 GB. Daniel Eran Dilger said that after upgrading from iOS 10.2 to the latest version of the iOS 10.3 operating system, the available storage space for the top iPhone 7 Plus (256GB) increased from 75.45 GB to 83.26 GB.

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The editor has installed more than 40,000 photos and 200 apps before the upgrade. Interestingly, the total number of system storage has also increased from 248.5 GB to 252.14 GB in increments of 3.64 GB.

One guess is that Apple released the previously mapped EFI partition and other underlying reservations. Because iOS 10.3 has been converted to the new Apple File System (APFS), the new format has become more efficient at using storage volumes.

AFPS is designed to take full advantage of modern "solid-state storage technology", compared to the old HFS+ file system for rotating disk-based mechanical hard drives. In addition, due to the support of the 64-bit file system architecture, it will be able to support larger storage capacity in the future.

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Due to the conversion process that includes the APFS partition, the in-place update of iOS 10.3 takes 30-50 minutes, which is a lot slower than before.

In addition to the underlying partition mapping, APFS includes support for the new "save storage" feature, such as file cloning. This feature allows you to map a cloned file to multiple locations, leaving the same file with only one storage space.

Of course, future iOS and third-party applications will further benefit from the new features of APFS. In addition to the APFS file system, iOS 10.3 also optimizes some high-level data storage functions, such as clearing cached data and other unnecessary files.

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