I’m a university student and aspiring historian and I think about this very often. An example being Donald Trump’s Twitter. That is going to be a very important primary source in the future when studying his presidency, but how would you determine which tweets are valuable? Or are all of them worth researching/noting? While the “information age” is great, is it going to possibly cause too much information for historians in the future?
/u/caffarelli has previously answered Is our reliance on electronic archival methods going to pose problems for future historians? but has written on the topic multiple times. More answers from other Redditors with Archives experience are welcome.
EDIT: I forgot to link to the section of the subreddit FAQ titled Historians in the digital age, which will have more answers for you.