I have the same size when I look at it in Explorer... properties page shows it as 1,112,575,744 bytes.

Could try the old windows chkdsk on the drive to see if maybe it has some corruption in the file system. I've noticed a few times that XIV doesn't appear to be shutting down gracefully or something with these 9000 and 2002 errors that sometimes throw us back to the desktop. Running a chkdsk has been resolving it for me, but haven't had any major issues like this yet--it's just been the launcher diving straight to the desktop with no errors logged.

In the Search box off the Start menu, type the letters "cmd" and you should see a link to CMD (should have a black/white icon, it's thumbnail for a DOS prompt). Right-click that shortcut in the search results and click to run as Admin so you are in an elevated DOS prompt. Type the following command and press the <enter> key:
chkdsk c: /F
(for those with XIV on a different drive, change the C: to the proper drive letter)

It should spit out a message about not being able to lock the system drive and ask if you want to run it during the next reboot (Y/N). Respond with Y and press <enter>. If it's not configured as a critical system drive, it may run it directly (even if it's a data drive, it will treat it as a system drive if your swapfile is on there). Type the word "exit" and hit <enter> to close the DOS prompt and then reboot your system. It should run through several phases checking indexes, security indexes... several things in the NTFS structures and metadata. It may take a while depending on how much data is on the drive, and may appear to stall at times (sometimes the progress percentage will actually count backwards and forwards a little). This is normal.

If someone is having a lot of problems with their drives, I usually tell them to run a second pass, but so far I've only needed one pass to resolve my issues with XIV files (so far).