1. Login to your account @ dataczar.com or @ connect.dataczar.com.
2. Select "Lists" from Main Menu.
3. Click on "Lists" in blue (next to Subscribers) to "Manage" your list.  Click “Manage” on the list you would like to add subscribers.
4. Note, if you only have one list (a default list), you’ll only have the one “Manage” button to click on.  
5. Click Upload (note - list will be uploaded to the list you selected to "Manage").
6. Drop .csv file or click to open file browser.

Note: you can send up to 2500 emails per month on the Basic Plan and 5000+ emails per month on the Pro Plan.  Currently there is no limit to the number of emails that you can add to your list.