2013~2016 SD again...

damanloox

Member
I've been reading about SD cards as I thought I should make a backup of my nav card (SD cards don't last forever and I'm not happy paying the dealer when the card fails to be honest). So - I managed to change card's CID to that of my oem card, then I cloned all contents (sector by sector) to the new card, then verified CID is correct and... "Invalid card" when I put it in the slot (version 70.00.100)...
Does anybody know how exactly can they recognise it's an invalid card...? Is there any other security feature on SD cards...?
Please note - I'm just trying to make a backup of the card, it has been locked to my car for a few years so won't work anywhere else ;)
And BTW - yes - I tried Mazda software to make a backup but when I try to restore to new card it asks me to go to a dealer and buy new "empty" card..
 
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