Many other devices from the 2Gb SD era, made before SDHC and SDXC existed, cannot read the modern cards, yet [Gregg]’s GPX can. Hackaday’s readership constantly amaze us with the sheer breadth ...

An SD card is just like a small hard drive — it's a device that can store and transport large amounts of data. If you've been using an SD card for a long time, you might need to clear it out.

Storage in an SD card is determined by the number of clusters, how many blocks there are per cluster, and how many bytes there are per block. This data is read out of the Card Specific Data ...