There are two ways to install the theme (back-end, FTP).
1.Please move to Dashboard >> Appearance >> Themes.
2.Please click Add New and click Upload Theme.
3.Please choose the zipped theme file and click Install Now.
1.Please access the FTP program same as Filezilla.
2.Please move to the place where you installed wordpress.
3.Please upload the unzipped theme folder in wp-content / themes.