Differences between SD & SD-S cards

[Astier]

Hello,

I find 2 references in memory cards, is there a true difference in the use or the security between them.
Are all SD cards compatible ?

There may be a thread on this topic, any link welcome,

Thanks

Jean-Jacques

[zakeen]

I beleive, could be wrong. That one is high speed and the other is standard. They are both compatible with each other. But the device reading the card must be high speed also. Otherwise it will read it at the slow bit rate.