MacVoices #20187: Jeff Carlson Takes Control of Your Digital Storage Again (Part 1) Storage might not be the first thing on your mind but it is where you store your data, so it is important to understand it. That’s why Jeff Carlson has updated his  Take Control of Your Digital Storage to further address APFS (Apple File System) features, functions, and issues that you might run into as you dig further into macOS Catalina and move (eventually) to Big Sur. In the first part of the conversation, Jeff talks about snapshots and their relationship to Time Machine, why some concepts are different when referencing spinning drives vs. SSDs, and some things to understand about buying storage. (Part 1 of 2)