fixed minor type in dev-en-HK 4

docs/lang/dev-en-HK/4.md

@@ -110,7 +110,7 @@ The filepath paramter will provide the file location in **relative to /AOR or ab
 3. External Filepath without extDiskAccess handler, e.g. ```/media/storage1/test.mp3```
 
 For type 1 and 2, you can directly load them to the user by putting the filepath in ```src``` elements.
-However, for type 3 filepaths, you will need to call to the External Disk Handler using ```./SystemAOB/functions/extDiskAccess.php?file=``` and follow by the absolute of the file. 
+However, for type 3 filepaths, you will need to call to the External Disk Handler using ```./SystemAOB/functions/extDiskAccess.php?file=``` and follow by the absolute path of the file.