To upload a file: 1       Open the container to which you want to upload the file. 2       Choose File > Upload.         Shortcut You can drag files to the container to upload them. If you drag files, skip the remaining step; file transfer begins immediately. 3       Select the file you want to upload. You can select multiple files or a folder. After a file is uploaded, it has a subject that reflects the file type. You can change this subject if desired. To do this, open the uploaded file's properties, then type the subject you want at "Subject".