uploading more than 3 million items on amazon using amazon web services
I have a subscription to a book database with .dat files. The relevent data needs to be extracted from the .dat files into a single file and uploaded on amazon. There are multiple .dat files. E.g. EAN number is in one .dat file, price and title are in another, etc. Also, the data in the subscription is updated every day. So I would like to be able to update the inventory daily. There are more than 3 million titles so excel files wont work here. This can become long term job. Please do not respond if you have never worked with amazon before or have never uploaded files using amazon web services. Uploading 50,000 items at a time with excel is not a viable strategy here.
I need someone who has experience with huge volume of items all at once. And, I need to be able to update the amazon stock once it is uploaded, preferable once a day.