Slamdot

From the dashboard, choose a plan. Click the files tab to take you to the file browser. Navigate to the folder where you want to upload. The current directory is denoted at the top of the file browser and will look like:

Back to: home > domains > yourdomain.com > public_html

When you're in the right folder, click the upload a file here link, then click browse to select the file you wish to upload.