You said "to my Xoom". You should be able to create folders, I'm assuming, on your PC under your \dropbox\dropbox folder and it should sync folder and contents. Maybe I'm missing something.
Creating the folder is not the issue...there is a folder in drop box and I want to down load the whole folder not one file at a time and I can't find a way to do that I can on my pc but not on the android tablet (XOOM)
There is not on the device. Do it on the desktop and let it synch over. You are out of luck with Box, that is manual process. Drop Box is better in so many ways.
Here having the same problem, got some files in dropbox folder, now want to copy them all to another folder but cannot find where this dropbox folder is located on my galaxy tab 2 7.0.
The tablet version of DropBox has some limitations. Open your DropBox account through you browser and you can download the files. Then they will be in your download folder of your tablet.