If you want to download your website partial/full backup, please go through the following steps:

Step 1: Login to your cPanel account.

Step 2: Click on the "Backup Wizard"



Step 3: Click on the "Backup" option



Step 4: Click on the "Full Backup" option for creating Full website backup

                               OR,

Click on the "Home Directory" or "MySQL Databases" or "Email Forwarders & Filters" option for creating specific website portion backup. (No Need to Go to Next Step)



Step 5: To create full backup, click on the "Generate Backup". You will be notified via email once the backup is created.



Step 6: Go to File Manager -> Home Directory. You will get tar.gz file which is your backup file.



Now just download it and you are done.