can u please provide link for liabrairy files??

@ Dmitry Suhamera I have used your code but after compiling it gives an error. Error: "count" is ambiguous in "P_storage.cpp", Line: 101, Col: 57 Error: "count" is ambiguous in "P_storage.cpp", Line: 102, Col: 26 *********************************************** #include "mbed.h" #include "BLE.h" #include "pstorage.h" #include "nrf_error.h" BLEDevice ble; uint32_t retval, count; uint8_t source_data[8] = {0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x01,0x02}; uint8_t dest_data[8]; time_t savetime, loadtime; pstorage_handle_t handle; Serial serial(USBTX, USBRX); // tx, rx static void cb_handler(pstorage_handle_t * handle, uint8_t op_code, uint32_t result, uint8_t * p_data, uint32_t data_len) { serial.printf("Callback handler successful\r\n"); switch(op_code) { case PSTORAGE_CLEAR_OP_CODE: if (result == NRF_SUCCESS) { serial.printf("Clear operation successful in Callback\r\n"); } else { serial.printf("Clear operation failed in Callback\r\n"); } break; case PSTORAGE_LOAD_OP_CODE: if (result == NRF_SUCCESS) { serial.printf("Load operation successful in Callback\r\n"); } else { serial.printf("Load operation failed in Callback\r\n"); } break; case PSTORAGE_STORE_OP_CODE: if (result == NRF_SUCCESS) { serial.printf("Store operation successful in Callback\r\n"); } else { serial.printf("Store operation failed in Callback\r\n"); } break; } } int main(void){ wait(5); serial.printf("Warming up\r\n"); wait(5); ble.init(); retval = pstorage_init(); if(retval == NRF_SUCCESS) { serial.printf("Module initialization successful\r\n"); pstorage_module_param_t param; param.block_size = 100; param.block_count = 10; param.cb = cb_handler; retval = pstorage_register(&param, &handle); //register our pstorage and store store address in handle if (retval == NRF_SUCCESS) { serial.printf("Registration successful.\r\n"); serial.printf("Module id: %u , block: %u \r\n", handle.module_id, handle.block_id); retval = pstorage_store(&handle, source_data, sizeof(source_data), 0); //store test data in bloc 0 if (retval == NRF_SUCCESS) { serial.printf("Store successfully requested. Wait for operation result.\r\n"); retval = pstorage_access_status_get(&count); if (count == 0) { // loadtime = time(NULL); serial.printf("No pending operations \r\n"); retval = pstorage_load(dest_data, &handle, sizeof(dest_data), 0); //try to load test data if (retval == NRF_SUCCESS) { serial.printf("STORE: %02x:%02x:%02x:%02x - %02x:%02x:%02x:%02x \r\n", source_data[0], source_data[1], source_data[2], source_data[3],source_data[4], source_data[5], source_data[6], source_data[7] ); serial.printf("LOAD: %02x:%02x:%02x:%02x - %02x:%02x:%02x:%02x \r\n", dest_data[0], dest_data[1],dest_data[2],dest_data[3], dest_data[4],dest_data[5],dest_data[6],dest_data[7] ); } else { serial.printf("Failed to load, take corrective action.\r\n"); } } else { serial.printf("Storage access pending, wait!\r\n"); //serial.printf("Time div: %d \r\n", (loadtime-savetime) ); } } else {serial.printf("Failed to request store, take corrective action.\r\n");} } else {serial.printf("Failed to register, take corrective action.\r\n");} } else {serial.printf("Initialization failed, take corrective action.\r\n"); } while (true) { ble.waitForEvent(); } }