Attached is a screenshot of my internal HD I use to store data on.  Why is there such a huge disparity between advertised capacity and apparent availability of actual HD space?

[attachment deleted by admin to conserve space]If the DRIVE is actually a 1.5TB Drive, than it was not partitioned to use the full space. You can observe the actual disk space in Disk Management (Windows key+R, "diskmgmt.msc").

To my unfamiliar eye, I do not see any difference in what the Disk Management utility tells me (see new attachment) and what the first screenshot I attached tells me. If it truly is a partition problem and not a misrepresentation on the part of WD ie. saying it's a 1.5TB HD instead of a 1TB HD, is there a way to repartition the HD without losing current data? How do I know what the capacity truly is?

[attachment deleted by admin to conserve space]The drive is a 1TB drive, not a 1.5TB drive. The Label "WD Caviar Black 1.5TB" suggests it is 1.5TB but you would have set the label at some point for it to say that.

-Do you still have the original packaging?
-What is the model number of the drive? You check the model number either on the sticker on the HDD itself, or  via Device Manager (Windows Key+R, devmgmt.msc, it should be under "Disk Drives", likely CONTAINING "WD" somewhere in the model)
Quote from: BC_Programmer on May 11, 2015, 11:32:31 AM

but you would have set the label at some point for it to say that.

What do you mean about "setting the label"?
It turns out I apparently ordered (and installed!!) a 1TB HD. I have the original box and googled the model number (yup - 1TB  ). I also found my order history on Amazon, where I bought it. (Yup - 1TB HD  ). I obviously thought I had a 1.5TB HD but didn't pay attention. And that assumption has only been reinforced by the properties dialogue box for my E: drive which shows: WD Caviar Black 1.5TB (see first attachment). Why is it showing up as 1.5Tb and not 1TB