If you are going to modify your template to add some cool features, codes or any other thing. You must Backup your template to avoid risk of any error. If you gets any error than this will help you to easily restore your previous template.I will show you how to Backup and Restore a blogger template.
To Backup or Download Blogger Template
Step 1:
Go to Blogger Dashboard > Design > Edit Html
Step 2:
Click on Download Full Template as shown below
Select path where you want template to be save.
To Restore or Upload Blogger Template
Step 1:
Go to Blogger Dashboard > Design > Edit Html
Step 2:
Click on Browse button as shown below
Step 3:
Select the template you want to store or upload and click Upload
Note:
If you are using new Blogger Interface than see image below to backup and restore blogger template.