ARMmbed

Microbit storage?

Hi to All,
I try to store some data to flash, using uBit.storage.put, and read it with uBit.storage.get, but so far without success. I need a help,

this is how I save data :
keyname=“CMBF00”;
function_text_ext="";
uBit.storage.put(keyname, (uint8_t *)&function_text_ext, sizeof(function_text_ext));

I read it with :
keyname=“CMBF00”;
char command_buffer[32];
KeyValuePair* flash = uBit.storage.get(keyname);
memcpy(command_buffer, flash->value, sizeof(32));
RESULT= “<D00”
any advice?
Thanks,
Damir

part is missing in previous message
function_text_ext="";

function_text_ext="<D00OLND00DIGITAL out"