images downloading in failed image section during updating product

i have already imported products with successful images but the next day when i am importing again my upgraded products from sho to woo and sync my old imported products its sync successful but the images again importing in the failed image section of the old products that already have images and its increasing my server space upto more then 10GB and impacting on my website theme and my website layout out and developer rearrange my layout again… please solve this issue otherwise i will discontinue my premium version i have purchased 6 months supports thats why unable to discuss in support chat