If you have a store in Magento https://cart2cart.net/...to-shopify-migration and want to migrate to Shopify, there is no direct way to migrate data from Magento to Shopify. You will have to export/import products one by one, manually add them to Shopify, and then update the URL for each product. In short, it's a slow process, but there is an app that can automate this part of the migration (just upload a new CSV file after the migration).