There are tools out there that help with this, but the better ones like the one I linked use the API.
I don’t know what will happen to them next month, but if you are thinking about it, keep in mind that they may not be around or work like they do today, and you may have to use other more convoluted tools.
This is so easy. I have like 2 or 3 accounts. I’ve used shreddit in the past, but I don’t feel like doing that again. I think I also did something similar to my twitter data, which involved getting an api key…that took months.