Website data retrieval

I’m trying to retrieve my Safari website data so I can save it to flash drive. I go to settings and scroll down to Safari>Advance>website data. I can see the data, but when I click on it, I can’t access the websites. How can I access the websites to see what I read, AND be able to save to a flash drive.

Also, at the bottom of the Safari page, just above Advance, under the heading Reading List, there is a topic, ‘Automatically save offline’ with a button toggled on( I didn’t do it), where do I find this reading list to access offline.

Another thing, when I click on Advance, just below website data is ‘JavaScript’ also toggled on, what’s that for, how do I know when to have it on or off.

I know this shows the level of my cyber knowledge…or lack thereof, but I’m getting there.

Thanks to anyone or everyone who can shed some light on these questions.