Downloading data to phone

Hi, I'm new to android development. I want to ask after logging the data to onboard flash memory, how to download and save them to my mobile phone?
I tried to use the code provided in documentation.
logging.downloadAsync(100, new Logging.LogDownloadUpdateHandler() {
@Override
public void receivedUpdate(long nEntriesLeft, long totalEntries) {
Log.i("MainActivity", "Progress Update = " + nEntriesLeft + "/" + totalEntries);
}
}).continueWithTask(new Continuation<Void, Task>() {
@Override
public Task then(Task task) throws Exception {
Log.i("MainActivity", "Download completed");
return null;
}
});

But where does the data go and how could I save them on my mobile phone?

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