Our current sandbox does not have a folder /home/user/hue, do you mean /user/hue?
You can upload files by using the Upload-button in the upper right corner (screenshot above). These files will be uploaded to the current folder, for example if you are in the folder /user/hue, files will all be in this folder after you have uploaded them.
The uploaded files are located in the HDFS, its not possible to access them directly via SCP