In order to upload a file using the mobile app, you must first take a picture of the document or have it stored in the gallary section your phone.
Step 1. Select the location (Category/ Sub-category/ Folder) from "My Documents".
Step 2. Click the plus button in the bottom-right corner.
Step 3. Select the document location from your phone.
Step 4. Next, assign the document to an Entity and select the "Save" button in the top-right corner.
Step 4. You will then see your document and can click on it to preview.