From an earlier post several of you asked me for the reference on the new Amazon image regulations.
Here is what the new reg says:
File names must consist of the product identifier (Amazon ASIN, 13-digit ISBN, EAN, JAN, or UPC) followed by a period and the appropriate file extension (Example: B000123456.jpg or 0237425673485.tif)
You can find this info and all other current regs at:
https://www.amazon.com/gp/help/customer/display.html?nodeId=200109520 (You may have to log into Seller Central to see that page)