Added image to dev-en-HK 5.md

docs/lang/dev-en-HK/5.md

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 ["File System API"]
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 # File System API
 ArOZ Online File System is the core of the whole cloud software system as it provide all the fundemental functions that is required for all WebApp modules. 
 
@@ -14,6 +16,8 @@ In simple words, the file system of ArOZ Online System consists of the following
 
 In this page, the functions and the API of the elements above will be introduced.
 
+![](img/devdoc/5/1.png)
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 ## File Explorer UI
 The File Explorer provide basic file and folder navigation functions for the ArOZ Online System.
 The File Explorer UI provides the interface for users to interact with on VDI Mode or PWA Mode.
@@ -33,6 +37,8 @@ The following functions are not included in the file operation function groups.
 - Open / Open With
 - Download
 
+![](img/devdoc/5/2.png)
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 ### File System Asynchronize Function Group
 The Asynchronize function group is a set of go-lang written programs that provide asynchronize file operation functions to the File Explorer. In the momenet of this document been written, there are 3 main binary files.
 
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 ```
 
+![](img/devdoc/5/3.png)
 ## File Selector
 ArOZ Online File System provide a simple way to access the file list and allow users to select files within the file system of your host device - The File Selector. 
 
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 }
 ```
 
+![](img/devdoc/5/4png)
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 ## File Explorer Shortcuts
 The file explorer shortcuts is a set of ```.shortcut``` files located under user profile directory. The .shortcut files contains the following information, each data is seperated by a newline. (\n or \r\n depends on your host device operating system).