Click on Products & Listings on the left hand side of the screen:
and then Manage Products:
Click on the Blue Add Product button to the right of the screen and then, in the drop-down, click on Upload via CSV or TXT.
You will need to download the Expandly Sample file and enter (or copy and paste across) your information. Some information is required and you will need to enter:
Title, Description, Total Quantity, SKU, Cost Price and Selling Price.
To download the sample file click on the blue Sample File button in the top right.
Upload your CSV file by dragging and dropping the document or clicking the choose file button and browsing through your files.
Once you have added your file, click on the green upload button:
Once uploaded the progress bar will be full and a tick will appear in the status column. You should also receive a success message.
TIP: If there is something wrong, an error message will appear and you may need to make an adjustment to the CSV.
Now just click Save and you will have successfully added a product using CSV.