Hi, error code 1 is a sign that there is something wrong with the SD-Card connection, RAM is no problem. Have you used level-shifters to ensure that the SD-card only get 3.3V? Otherwise you can damage the card. Are you using any kind of shield for the SD-card? You find also info about wiring the SD-card in the file SimpleSDAudio.h, this also explains how to build the level shifters.