Why did my ex screenshot and save pics on Snapchat?

So this is a quick update if you will. I decided to accept my ex girlfriend on Snapchat mostly because I’m doing good (started a career at a Fortune 500 company paying well and I got my 6 pack back!) Anyway i decided to accept the request and almost immediately after I get notifications on Snapchat. She had taken like 5 screenshots and saved about 15 pictures. They had all been saved from the previous conversations we had -before she blocked me and dumped me. Anyway I never said anything bad, threatening or mean to her, also nothing sexual was in the saved messages. Most pictures are of us as a couple many on our trip for a wedding that we attended and the hikes, rafts etc we did while there. Conversations that were saved are mostly me telling her how much I love her as well as me basically begging for her to stay with me. Ya pathetic I know but I’m not that way anymore.
anyway why would she do that? Is she just being weird or is it something else?
Why did my ex screenshot and save pics on Snapchat?
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