Why does the SD card logo feature a disc when the technology is solid-state?

The SD card logo contains a distinct, disc-like shape, which seems contradictory for a solid-state storage format. This video investigates the origin of this design choice and explores the historical context behind the branding of SD cards.

The video examines the visual branding of SD cards, specifically questioning why the letter 'D' in the logo incorporates a disc-like element despite the cards being solid-state devices. It highlights the disconnect between the logo's design and the actual physical nature of the storage technology.

By exploring the history of the logo, the video provides insight into the branding decisions made during the development of storage formats. It also touches upon the broader context of competitive storage technologies, including the success of the DVD over the Laserdisc.

Source: The Odd History of the SD Logo