Apple hides some of its best features through obscurity, not intentionally. For many years you have been able to select and change the icon of a storage device like a file, folder, volume, or drive in macOS. But it’s a multi-step process that requires starting with the right image.
You can find the source icons all over the place. Generic ones are available at places like IconArchive and DeviantArt (which has a lot of NSFW content, but not drive related); companies that sell drives often make downloadable icons available of all the models they sell, like One World Computing and LaCie. Also, you can copy an icon from an existing volume. You can also find little projects, likese these 20 icons made from historic Japanese patterns by a designer at software maker Panic in 2012.