Step 1.  To create a folder start by selecting "My Documents" from the mobile app.

Step 2. Select the category and then subcategory where your folder will saved.

Step 3. Select the "+" button on the top right of the screen and you will be prompted to enter a folder name. Once you enter the folder name select "save".

You can now select that folder and begin uploading documents. 

Please note: You cannot delete folders when signed in with the mobile app.