I Can't Allocate My 4TB SSD

May 9, 2018
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So after years, I finally decided to make the jump to an SSD. I just bought a 4TB Samsung 860 EVO. So, of course I've been trying to clone the drive with Samsung's data migration software. I have a 2TB HDD which I want I want to transfer all of my data from. The problem is that when the cloning process is complete, I go into disk management and I have over 2TB of unallocated space left on the SSD.

It won't let me extend the C: drive. It won't let me create a new volume with the unallocated space.

Two troubleshooting ideas I've already tried: Yes, I have already tried converting from mbr to gpt partition. Second, I've also gone into the bios and turn on UEFI, because I've read that might be the issue as well with large drives. Neither of these has yielded a solution because it's still not working. I have no idea what to do or what I'm doing wrong.

I've spent the last two days doing constant cloning transfers, which takes hours because I have so much data on the 2tb drive, trying to fix this. The best I can figure is I have broken SSD. I spent a ton of money on that SSD and I can't even use it to it's full capacity. Someone please, help me with this.

~j
 
Solution


Cloning from the 2TB carried over whatever it was originally formatted at. Was/is it MBR?
You can only change from mbr to gpt thusly...
4TB as the boot drive (the whole C) is problematic.

It must be partitioned as GPT, and you can't change it after the fact.
How was the source drive formatted? At 2TB, you may not have noticed.

And the motherboard has to support UEFI as the boot protocol. It probably does, but that's one more thing to consider.

Finally, I never recommend a drive that large as the OS/boot drive.
That's a lot of stuff to manage when you have to reinstall the OS.
 


I don't understand, so I can't use all of the space no matter what I do? Do I have to format my 2TB drive and covert it to gpt?
 


Cloning from the 2TB carried over whatever it was originally formatted at. Was/is it MBR?
You can only change from mbr to gpt thusly: https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt

And you should REALLY have a good backup before you go down that road, just in case.
 
Solution


Well, it took some time but I use the WinPE and got it to work. I now have have 2tb of extra space. Thank you!