Build Social Media Content Database

I have an Instagram account with a group message thread containing thousands of memes dating back to 2016. This job would entail saving each meme/image/video from the group message with the saved file name reflecting the "@" instagram account from which the meme/image/video originated. Ideally the memes/images/videos would be stored in a shared DropBox folder. I don't know of any way to do this task other than manually scrolling to the top of 5 years worth of content and saving/screenshot/screen-recording (and cropping) each piece of content to be saved.