Update README.md

Author: wkh237

README.md

@@ -399,10 +399,12 @@ RNFetchBlob.config({
 
 #### File Access
 
-File access APIs were made when developing `v0.5.0`, which helping us write tests, and was not planned to be a part of this module. However I realized that, it's hard to find a great solution to manage cached files, every one who use this moudle may need those APIs for there cases.
+File access APIs were made when developing `v0.5.0`, which helping us write tests, and was not planned to be a part of this module. However we realized that, it's hard to find a great solution to manage cached files, every one who use this moudle may need these APIs for there cases.
+
+Before get started using file APIs we recommend read [Differences between File Source](https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#differences-between-file-source) first.
 
 File Access APIs
-- [asset (0.6.0)](https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#asset)
+- [asset (0.6.2)](https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#assetfilenamestringstring)
 - [dirs](https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#dirs)
 - [createFile](https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#createfilepath-data-encodingpromise)
 - [writeFile (0.6.0)](https://github.com/wkh237/react-native-fetch-blob/wiki/File-System-Access-API#writefilepathstring-contentstring--array-encodingstring-appendbooleanpromise)