B550 for streaming?

Hi, I'm new to PC building, so I'd like to ask a few things.
I recently ordered a Ryzen 7 5800X and a B550 Aorus Pro AC. I think I'll add a 3070 and a NVMe SSD. In the future, I'd like to add an Elgato 4K60 Pro Mk II, which uses one of the x16 PCIe ports, and maybe I'll also add another SSD, it may be another PCIe 3.0 or maybe a SATA, but I still don't know. I want to know if all that would work or if I add another SSD I will have used all of my PCIe lanes, and, if that's the case, it will make my computer run slower or maybe it will make my capture card or graphics card run worse. I've been told that with the lanes that come from both the chipset and the CPU I shoulb be alright, but also have heard that I wouldn't be able to run a second SSD because that port would be deactivated or something like that. I already ordered the MoBo, so I hope I don't have to switch to a X570, since they are also a bit more expensive.

Thanks in advance!


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