Step 1: Go to "Units" in the left navigation bar.

Step 2: Select the specific unit to which you want to add a document.

Step 3: Click the "Documents" tab.

Step 4: Click "add files" at the bottom right corner of the page.

Step 5: You can also share files that have already been uploaded by clicking "Share Documents."

Note: You can add and share files directly from Documents in the main navigation. This is recommended if you are sharing files with more than one unit.