Yes, Samsung Galaxy On5 does support USB OTG functionality. You can connect your external drives to your Galaxy On5 and view the files on your phone. Make sure the file format on the drive is supported on your phone. You may need to format the drive to the required format if needed. Ensure you have taken a back up of your important files before proceeding.
Samsung Galaxy On5 is one the low price smartphone from one of world leading brand, Samsung. It also their low priced smartphone which supports 4G. Samsung Galaxy On5 does support OTG. Check out Samsung Galaxy On5 on Flipkart