Is this PSU enough for my build?

Oct 7, 2018
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Hello everyone, I am relatively new to the PC building sport, and am about to build my first one. I was wondering, is this Corsair 750 watt PSU enough for a 1070ti, i7 8700k and 16GB RAM?
Or should I upgrade to 850 watts?
Also, is 2TB enough or should I do a 3TB harddrive?
Any answers are appreciated
:)