When people ask us what file types are supported by SmugMug, our answer is that, 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.
In order to backup RAW files to SmugMug you need to have SmugVault. Because SmugMug only supports JPEG, PNG, GIF files. Whereas, SmugVault supports all the other file types, such as RAW, TIFF, PDF, PSD etc. SmugVault is an added service to the SmugMug account that you get by paying a little extra charge.
So, it is better to upload JPEG / JPG files along with your RAW files.
You can now install PicBackMan's SmugMug uploader for Mac from the website and start backing up SmugMug Photos & videos.