I bought SSD Samsung 850 Pro drive from my friend and it was NTFS formatted. I used macOS Disc Utility to erase it and after doing this the disc has 24 GB only (instead of 1TB). Any solution how to resize it to its previous capacity?

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  • external usb case Commented Jan 9, 2017 at 15:25
  • OK, if the SSD is no fake, the only culprit left is the case/its USB and/or SATA controller. Do you have a second external case?
    – klanomath
    Commented Jan 9, 2017 at 15:57
  • unfortunately don't have second one Commented Jan 9, 2017 at 15:59
  • Found a similar case Samsung 850 Pro 1TB SSD only shows 22.4GB capacity??? with 22.4 GiB (base 1024) = 24 GB (base 1000).
    – klanomath
    Commented Jan 9, 2017 at 16:21
  • found second usb/sata case but nothing changed Commented Jan 9, 2017 at 20:36

1 Answer 1


In my opinion you didn't buy a 1 TB SSD but a 1 TB + 24 GB SSHD (a hybrid drive similar to Apple's Fusion Drives). At least 46949230 blocks à 512 Bytes amount to ~24 GB.

I haven't been able to find a model though (except for an SSHD option with the same sizes in some Dell laptops).

If the HDD part isn't visible at all, it's probably incompatible with macOS' disk framework.


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