Why is there no write access to the microSD card?

Question

Android

Tell me why there is no write access to a removable microSD card?

File writeFile = new File("/mnt/extSdCard/Temp/qwe.txt");
                    try {
                        writeFile.createNewFile();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

I get
java.io.IOException: open failed: EACCES (Permission denied)

Answer 1

google google you are powerful ... first link, specially checked)
in a droid everything needs permission, internet, camera, map...