If you have already downloaded the complete package of Hostiko from the themeforest dashboard then open the zip file and search for the “Hostiko 2.0 Theme” folder.
To install the hostiko 2.0 theme you need the to unzip the hostiko.zip file you will find in “Hostiko 2.0 Theme”.
Step 2:
Connect your FTP server using any software like winscp or filezilla
Go to wp-content > themes folder and upload the unzipped folder there.
Step 3:
Login to your wordpress admin and Navigate to Appearance > Themes and hover over the Hostiko theme and then click on activate button to Activate the Hostiko Theme.