Question: How much memory does a computer have?

ΞGΞRΞOΞZΞNΞYΞY:
I have 3 terabytes of 1200GB and 3 thumbnails of 400GB

Vasovsky is:
How to understand 3 TB to 1200 GB?

ΞGΞRΞOΞZΞNΞYΞY:
If you don’t know what therabytes are, I’m not venovat ;-)
Terabyte is such a thing on it 1200GB of memory on it can windovs install