Can I get an external SSD?

I'm getting a gaming desktop but most that I find have SSDs that are either 128 or 256GB. Do I need more if I'm going to be playing some high end games but not streaming? Battlefield 1 requires 50GB space and I have some other pretty big games in mind that I want to be able to play. Can I get an external... show more I'm getting a gaming desktop but most that I find have SSDs that are either 128 or 256GB. Do I need more if I'm going to be playing some high end games but not streaming? Battlefield 1 requires 50GB space and I have some other pretty big games in mind that I want to be able to play. Can I get an external SSD or is it better to just get an HDD in that case?
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