//"/storage/emulated/0/Android/data/au.com.interlogix.tecommobilev2/files/Download/" 
            var sdkLogPath = Application.Context.GetExternalFilesDir(Android.OS.Environment.DirectoryDownloads).AbsolutePath + "/";
            HCNetSDK.Instance.NET_DVR_SetLogToFile(3, sdkLogPath + "/", true);

            //HCNetSDK.Instance.NET_DVR_SetLogToFile(3, "/mnt/sdcard/sdklog/", true);
            //path of the folder, sdklog file SdkLog_1_W.log
            //var sdkLogPath = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "sdklog/");
            //"/data/user/0/au.com.interlogix.tecommobilev2/files/sdklog/"
            //var sdkLogPath = Path.Combine(FileSystem.AppDataDirectory, "sdklog/");
            //System.Environment.SpecialFolder.MyDocuments is the same as FileSystem.AppDataDirectory or
System.Environment.SpecialFolder.Personal
            //no SdkLog_1_W.log created
            //https://kimsereyblog.blogspot.com/2016/11/differences-between-internal-and.html
            //Internal folder
            //Use this storage to store document specific to your application which will not be accessible from else where.
            //Another important point is that when the user uninstall the application, all the data within that folder will be
removed.
            //var rootDirectory = System.Environment.GetFolderPath(System.Environment.SpecialFolder.MyDocuments);
            //var sdkLogPath = rootDirectory + "/";
            //Public external folders /storage/emulated/0/
            //var sdkLogPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + "/";
            //tested isWriteable = true
            //bool isWriteable = Android.OS.Environment.MediaMounted.Equals(Android.OS.Environment.ExternalStorageState);
            //"/storage/emulated/0/Download/", use the next one
            //var sdkLogPath = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath,
Android.OS.Environment.DirectoryDownloads) + "/";