Since this is a group of folks who deal with hard drives all day I can think of no place better to post this. I recently acquired a WD Black 8tb external hdd to backup an 8tb data drive that is in my system. My data drive has 6.74tb of data on it. When I tried to do a 1:1 copy to the WD it said I was something like 750+gb short on space. I have tried using hd sentinel and disk genius to get an idea of what's up to no avail. Fresh out of the box I formatted the drive and it showed the proper 7.27tb in Windows yet I still can't copy 6.74tb to 7.27tb. Doing the math it almost seems as if the WD enclosure actually has a 6tb drive installed in it with the firmware fudged. Or, there is a shit ton of bad sectors that can't be written to but I feel like hd sentinel at least would have reported this. Looking for input and feedback.