In order to incrementally upload the bulk of your inventory items follow these steps:
Change the Monitor Options
1. Go to Ecommerce tab > Web Store Setup > Monitor Options
2. Select "Do Not Update..."
Remove all items from Internet Inventory
1. Ecommerce tab > Web Store Inventory
2. Click the Tag All Items button (multiple multi-colors check marks)
3. Click Remove From List button
Clear Items To Be Processed
1. Ecommerce tab > Send To Web Store
2. Click Clear List button on the bottom left
Add Items to Internet Inventory List by Category
1. Ecommerce tab > Web Store Inventory
2. Click Import Item under the Actions menu
3. Choose option Dept/Catg
4. Highlight a category and click Select at the top right
Manually Upload Internet Inventory
1. Ecommerce tab > Web Store Inventory
2. Click the Tag All Items button (multiple multi-colors check marks)
3. Click Send Tagged To Website
Keep in mind that with the settings changes made in the section "Monitor Options" above, any sales, inventory item changes (e.g. pricing, relocation, etc.) will populate the "Items waiting to be uploaded to website list" in the Send To Web Store > E-Commerce Website Update screen, so you will need to perform the "Clear Items To Be Processed" step periodically.