How to import products to WooCommerce without importing images but using external image url instead

Currently I’m trying to import product data in CSV format file to WooCommerce. The data is very large so I don’t want to import the images into gallery which eats up the hard drive storage space. Instead, I want to use the existing external image URLs directly as remote images, which are already there. In the meanwhile, this can also reduce my server’s workload.

However, when I tried the built-in “import” function in WooCommerce-> All Product , the external images were all imported into gallery automatically.

Is there anyone who know how to solve it?