For optimum performance, Loxone OS accesses many low-level functions of the SD card, unlike, for example, a digital camera. Wow, this is exciting! What mystery low level functions are they using? Time ...

One is the SDIO mode, which is used by your average card reader, your camera, etc. It's fast, and somewhat complicated ... but I have yet to actually copy the entire SD card that way (might take a few ...