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With APFS, Apple focuses on storage efficiency in its OSes

Lucas Mearian | June 20, 2016
The new Apple File System will span iOS, OSX tvOS and watchOS, but some question whether it's needed

For example, Apple said, an APFS container with a capacity of 100GB that contains volume A, using 10GB, and volume B, using 20GB, would report the free space for both volumes A and B is 70GB.

The base storage unit for APFS is a container, which generally maps 1:1 to GUID Partition Table (GPT) entries and manages its own space allocations and crash protection scheme, according to Apple's APFS developer's guide.

 

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