Hello,
i got some troubles with the 2mb of spi memory flash with this new MKR mem shield,
therefore the Sd card works perfectly well with the correct cs pin selected (pin4),
the Pin 5 (as cs) fail where it's supposed to work in the same condition since they share the same spi Bus (following the Arduino getting started website page...)
i use the SD lib.
2MB doesn't really worth it, but i m curious how can i make it run and learn something new by the same way...