Many of PS Audio's products enjoy the benefits of updates to keep them sounding great as well as fix bugs and make improvements to functionality. These updates are typically performed through the use of an SD memory card. This video explains how to perform this function.
The types of SD cards and formatting them can be found here: https://www.psaudio.com/ps_faq/sd-card-questions/
httpv://youtu.be/trByH4QwZCY