I purchased a new SanDisk Extreme 2TB (from Amazon), as noted on the outside of the case, but it only shows 465GB in Windows 10 disk formatter utility. I ran the NTFS formatter on it, and it allows me to drag and drop files into the volume but doesn't show the 2TB capacity that I expect to see. Any reason for this, is this product not correctly labeled, e.g. is it a 500GB unit that would correctly show the capacity as 465GB?