UI sucks, honest first time user

[CruiseMan]

Let me put it simple, written to disk 0 but written in Activity Monitor 21GB, why ?

[bitpaint]

Let me put it simple: wait for the full blockchain to be downloaded before opening Issues.
Why did you not include this part on the screenshot?

[k9ert]

I'm not sure what you exactly expect here but as @bitpaint said, doesn't look very clearly like a bug. Shifting to discussions ...