I believe the issue with SD cards might have something to do with how the cards are seated inside the card slot. I suppose it's possible different SD cards are slightly thinner/thicker than others and this could be partly why some don't make proper contact. Seems there might be some "give" in the space where we insert our SD cards. What I have done is inserted (one at a time) a couple of the SD cards that were not working in the quad before, then used my fingernail to moved them around just a bit where there seemed to be some of the "give" I describe. After doing so, my P4P reads, formats, and writes to both cards. Anyone else tried this?

Seems this may be why cards work sometimes and not others, possibly because when you remove and reinsert the cards you are effectively seating the card where it needs to be in the slot for proper contact.

Just a theory. Could be a total fluke though.

I believe the issue with SD cards might have something to do with how the cards are seated inside the card slot. I suppose it's possible different SD cards are slightly thinner/thicker than others and this could be partly why some don't make proper contact. Seems there might be some "give" in the space where we insert our SD cards. What I have done is inserted (one at a time) a couple of the SD cards that were not working in the quad before, then used my fingernail to moved them around just a bit where there seemed to be some of the "give" I describe. After doing so, my P4P reads, formats, and writes to both cards. Anyone else tried this?

Seems this may be why cards work sometimes and not others, possibly because when you remove and reinsert the cards you are effectively seating the card where it needs to be in the slot for proper contact.

Just a theory. Could be a total fluke though.