Ok, i am still not completely understanding what you are searching for, but if you want to undestand how to use the Wix-Storage…
https://www.wix.com/corvid/reference/wix-storage/introduction
Then i can give you an little example…here…
https://russian-dima.wixsite.com/meinewebsite/lightbox
This example shows you how to create the data-transfer from your page to lightbox. It’s a similar situation, as if you would transfer data from one page to another without loosing the data (after refreshing your site for example).