You may have to format and re-partition the disk. Also change the type from GPT to MBR.
This discussion explains further. Seems you're not the only one that has problems with the larger EVO drives.
June 2, 2014 9:20:53 AM
I had a similar issue with my 1TB Samsung SSD EVO, problem seemed to be because the drive comes as a GPT partition and you will require setting the drive to MBR. I've read solutions from other places that say to take the drive out and connect to another computer running Windows and convert to MBR but that is quite ridiculous to do when you can set the drive to MBR from the Windows installation CD. Boot up your pc with your windows installation disc and go to Repair my computer, from there get to the list of options that can help repair an existing install of windows. Continue onto the Command Line Prompt. Once on the command prompt ex: X:\ or whatever it shows for your drive, type diskpart. Once in diskpart type list disk. From there it will list yours drives, type: select disk (list disk will show Disk 0, Disk 1, etc.. select yours) select disk 0, hit enter. Type list disk to make sure your drive is selected, it will have a * next to it. Now you want to type clean (note: this will delete all files and partitions on your drive) after that type convert mbr then exit after its done. And that's it. You have now converted your GPT drive to MBR and will be able to install Windows 7 or whatever version you like. I will list the steps again below in a more proper fashion.
To change a GUID partition table disk into a master boot record disk using command line
Back up or move all volumes on the basic GUID partition table (GPT) disk you want to convert into a master boot record (MBR) disk.
Open an elevated command prompt and type diskpart. If the disk does not contain any partitions or volumes, skip to step 6.
At the DISKPART prompt (right-click Command Prompt, and then click Run as Administrator), type list disk. Make note of the disk number you want to delete.
At the DISKPART prompt, type select disk .
At the DISKPART prompt, type clean.
Running the clean command will delete all partitions or volumes on the disk.
At the DISKPART prompt, type convert mbr.
Once completed, type exit and resume installation of Windows.