Start by going to the project to which you wish to add a document, then click on “Documents” :
Once in the “Documents” view, click on the “Add” button at the top right of your screen :
You will then be able to add a document or a folder of documents. Click on “Document” :
A new window will appear, allowing you to drag and drop a file or choose one from among your files. If you wish to import a document from your files, click on “Select documents” :
Choose your file and click on “Open” at the bottom right of the window :
Finally, click on “Import” to confirm the operation :
Your document should now appear in your document list.