You can add products to SellerExpress in several ways:
1. Initial Import
Automatically imported during account set-up from select marketplace. Please see more information here.
2. Barcode (UPC / EAN) / Product title search.
You can use the Product / Barcode / ASIN search at the top of SellerExpress shown below which should bring up the product details. You can then click on the product which will take you to the Add Product screen with some of the details prepopulated.
3. Manually add products by key entering data.You can manually enter your products details one at a time by selecting 'Add Product' from the 'Inventory Menu'. Once you've typed in the data hit 'Add' to create the product.
4. Import your Product Listings using a .CSV file.
You can use either a 'Basic Import' or 'Advanced Import' to create / update products in bulk. The 'Basic Import' will give you the most common options and fields while the 'Advanced Import' will give you the more detailed choices.
Read more about the 'Basic Import' here.
Read more about the 'Advanced Import' here.