Overview

Managing your Amazon product catalog efficiently often requires working with inventory files rather than editing listings one by one. Seller Central provides several methods for modifying your inventory through file uploads, allowing you to update existing products, add new listings, and remove items from your catalog in bulk. Understanding how these file-based workflows operate is essential for sellers managing large catalogs or making frequent changes to pricing, quantities, and product data.

Key Points / What Sellers Need to Know

• Incremental uploads are supported — You do not need to upload your entire product catalog every time you want to make a change. Files containing only the SKUs you wish to update, create, or delete are sufficient.
• SKU is your anchor field — Amazon uses the SKU to match your uploaded data to the correct catalog entry. Never change a product's SKU value, or the system will lose the connection to the original listing.
• Price and Quantity files offer the fastest updates — If you only need to adjust pricing or stock levels, the simplified Price & Quantity file accepts just three columns (SKU, price, and quantity) and processes quickly.
• Deletion methods vary by product category — The steps to remove a product differ depending on whether you sell in BMVD (Books, Music, Video, DVD) or non-BMVD categories, and which file type you use.
• Always verify upload results — After every file submission, review the processing report to confirm that your changes were applied successfully.

How Inventory File Modifications Work

When you upload an inventory file to Seller Central, the system processes it incrementally. This means your existing catalog data stays intact, and only the SKUs included in your uploaded file are affected. For example, if your catalog contains three SKUs and you upload a file modifying just one of them, the other two remain unchanged. Over multiple uploads, the catalog accumulates all changes — new products are added, modified products are updated, and deleted products are removed. This incremental approach is particularly useful for sellers who regularly adjust pricing or restock quantities without wanting to rebuild their entire product feed each time.