Looking in more detail at newer tricks used by APFS on the data of files: sparse files, which can squeeze vast empty files almost to nothing; file clones; and compression, opening up in Big Sur.
compression
Tests bring some surprises, with encrypted sparse bundles looking resilient to small amounts of corruption.
The first tools to write HEIF still image and HEVC movies are now starting to arrive. Do they confirm their potential? Are they ready to use yet?
High Sierra and iOS 11 introduce HEVC video, and HEIF still image compression. But what good are they?
Which compression utility do you recommend?
How non-lossy and lossy forms of audio compression work.
How you can strike the right balance between efficient compression of an image, and its quality.
This is how to deal with an email attachment or web download which is not correctly recognised, to make it accessible.
I read that Apple Lossless audio compression is not perfect, but that XLD is more faithful. Is that true?
No matter how much disk storage you have, it just seems to fill up. Compressing little-used and archived items might be a good way to save space. Does it?
The Eclectic Light Company 