In order to add an equipment, you just have to :
click on the "Equipment" tab located on the bar on the left side of the screen
Click on the "+ Create" icon at the top right
Fill in the boxes with the details of your equipment.
Click on "Save" at the bottom of the page when you are done
Once you have registered the piece of equipment, the equipment record is displayed. There you can add maintenances (planned or unplanned) related to this equipment and add attachments.