After installing the drive in my desktop PC, I initialized GPT and formatted NTFS in Win 10 Pro 1903. The binary / base 10 conversion left 5.45 TB usable, which is what I was expecting. I don’t like to fill HDD’s past 90 – 95 % capacity for overhead / drive optimization purposes, so I consider this roughly just over 5 TB’s of usable drive.
https://www.amazon.com/Western-Digital-WD_Black-Performance-Internal/dp/B08T7W9T6C

