[Plugin: Woocommerce] Display & Attachment

I have the Woocommerce plugin in order to sell my digital products (photos). I currently have to set the featured image (as a thumbnail), then link the original size photograph to it for every single one… and I have about 300+ photos to go through.

Is there an efficient method or a different plugin, where I can just upload all of the photographs and have them to be displayed as thumbnail size, with the original attached when purchased? Please let me know, thank you in advance!