Hi Manish,
not via HTML5, Javascript.
You may need to use ActiveX on Windows, or Java Applets, but it would lead to more problems with security and compatibility.
I would suggest to use a server-side functionality for that.
For example WebDAV+WebDAV Ajax Library.
Or php-based file manager.
What server do you use for SAPUI5? Netweaver? Tomcat? Apache?
Regards
Konstantin