MacOS quick-fire questions

How to copy a folder to my Macintosh HD disk?

> In Catalina you can’t copy anything to the top level of your startup disk, as that’s on its read-only System volume. Instead drop that folder into your Home folder, which you can write to as it’s on the Data volume.

How to correct Storage in About This Mac?

> This breakdown by type can be valuable. But it’s easily fooled by links and aliases, and sometimes just doesn’t work right. Disk Utility shows more accurate figures, and DaisyDisk from the App Store is better on detail.