air Macbook M2 16gb ram vs 512gb ssd?

Hi, i just bought a macbook air m2 with 8gb ram and 512gb ssd because i was afraid of the 256gb mono chip. But I still have the option to replace it with a 256gb ssd and 16gb ram, what should I do? I use mainly for university. I don't do video editing or anything like that, but maybe for the

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