To back up non-WordPress folders:

Step 1: Go to BlogVault website and sign up using your email ID. 

Step 2: On the BlogVault site listing page, select the website of your choice.

Step 3:  Click on the Details button present in the Backup module, you will see the total files that were scanned. Click on "View All".

Step 4: In the next page, scroll down to the folders that are marked in red by BlogVault while scanning.

Red colour means that the file or folder was skipped while backing up, select the folder from them that you want to add in next backup.

Step 6: BlogVault will tell you about why the folder is being ignored. Click on OK.

Step 7: Click Add.

Step 8: That’s how you add/download a non-WP folder so that BlogVault scans it too.

Read more: How do I pause backups?