extremely slow performance on upload

[DirtyNightmare]

so i tryed to copy a picture with jcifs to my smb shared folder and it took me 4h for 100kb picture i then tryed with es files and there it was instanlty
here is my code

protected String doInBackground(String... params) {

            File file = new File(filestocopy);
            String filename = file.getName();

            NtlmPasswordAuthentication auth1 = new NtlmPasswordAuthentication(
                    servername, username, password);

            try {

                SmbFile sfile = new SmbFile(servername + "/" + filename, auth1);
                if (!sfile.exists())
                    sfile.createNewFile();
                sfile.connect();

                InputStream in = new FileInputStream(file);

                SmbFileOutputStream sfos = new SmbFileOutputStream(sfile);

                byte[] buf = new byte[1024];
                int len;
                while ((len = in.read(buf)) > 0) {
                    sfos.write(buf, 0, len);
                }
                in.close();
                sfos.close();