I understand that i have to follow the steps as below… However, wordpress claimed that the file is too large
Step 1. Theme installation
Go to the menu Appearance > Themes and click the Add New Theme button.
Click the Upload link.
Click the Browse button and navigate to the unzipped template package on your computer.
Look for a file called precious-lite-pro.zip Click on it to select, then click OK.
Click the Install Now button and wait until the installation is complete.
Click the Activate link to change the current layout of the site to the theme your purchased.
Congratulations, your theme have been successfully installed!