In ShareSpace communication dashboard you can not only write messages but also exchange files.
At the bottom of your panel, you will see the button UPLOAD FILE OR DRAG IT HERE. Click it to choose the files you want to send to the other participants of the transaction. After your files upload to the message preview window, click the little dark purple arrow.
Your files will be uploaded into the window chat. You can always access all files sent by you and other members of the deal by opening the ATTACHMENTS tab from the menu on the right. A side menu will slide out, showing you all categories of files exchanged in this chat window. Click on the little arrow to open each category. If you want to preview or download any file, use the buttons underneath the file icon.