Just purchased a new Droid Z Force which has 32gb of memory. I need to add to the internal memory by adding a SD card...so I can not get/find the correct brand and type to work. I have tried several brand new different cards and all are rejected by the phone saying too slow. Motorola does not recommend more than 128gb for internal memory. SDHC 10 High Speed UHS-1 is the type they said to use except it didn't work either. Micron computer sales people said SDHC is the older kind and could not find any. Besides returning the phone what can I do?