You can add JPEG, GIF, and PNG files to your SmugMug account. To add larger files and other file types like RAWs, TIFFs, and PSDs you need to have SmugVault.
SmugVault is an additional service to your current SmugMug account and it allows you to store anything for a small additional charge. The files which are not supported by SmugMug can be stored here in SmugVault and accessed in your SmugMug galleries.
You can upload video files to Smugmug with a size limit to 3 GB up to 20 minutes long. Anything beyond that will have to be uploaded at SmugVault.
You can now install PicBackMan's SmugMug uploader for Mac from the website to backup upload and download SmugMug Photos effortlessly.