Below we have listed step by step procedure to backup SmugMug photos.
Note that PHOTO and VIDEO upload shouldn’t be running. Also it might take time for migration to complete depending upon number of photos you have in your SmugMug account.
Here’s the video tutorial you can refer to
PicBackMan is a free photo/video uploader that helps you to keep your memories backed up to your favorite online services.
Users in 130+ countries have backed up.
... an excellent job of uploading more then 300GB of photos to 2 different services