It's certainly possible to *copy* your My Documents folder onto another disc, of whatever type, simply by drag-and-drop.
This is always a good idea anyway, primarily to give you a back-up of all your valuable documents. Indeed, there are many utilities to ensure that the backup copy is kept updated so that, for example, any new or amended docs in your My Documents folder will automatically be copied to the backup disc.
However, you specifically asked whether it would be possible to *move* the folder. While this would be physically possible, that would leave you without the backup - are you certain that's what you wish to do?
Note that if you *move* the My Documents folder contents, so that they're no longer present on your main drive, Windows will automatically re-generate many of the sub-folders (My Music, My Videos, etc), but they will be empty. But in many cases, by default, it will continue to save data files, images, etc, into these sub-folders on the main drive, so you'll have to keep on moving them. HTH.