Full path of a file

[Anke]

@Patsou

If i write /4160-203F/TextFile.txt perhaps it go on my phone but what about the others ?

Copy file from removable SD card - ASD (Taifun File Extension)

Copied from ASD on the removable SDcard to what? The removable SDcard is read-only since API 19 (Android 4.4 / KitKat)

How do I save text in .txt file in internal storage?

What do you mean by "sdcard"? If you mean a removable (mircro) SDcard you can't, because since Android 4.4 (KitKat, API 19) this is read-only. See also here: