4TB Hard Drive Shows as 2TB, 1.6TB or Even Less

Jean updated on Dec 14, 2018 to Partition Manager | How-to Articles

"I bought a 4TB Western Digital hard drive just yesterday. However, it only shows up as the only 2TB on the computer. It's nearly empty, I haven't put any files or anything into it. Anyone know how to find the other 2TB capacity?"

Why Does 4TB Hard Drive Only Show up as 2TB

In the first place, please download EaseUS partition magic software, where you need to check the partition style of the hard drive in question.

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 Windows 10 is supported

In Windows 10/8.1/8/7:

  • Launch EaseUS Partition Master.
  • On the disk map in the lower place, your 4TB hard drive should be labeled as Basic MBR.

That's where the problem arises! There are two prevailing styles of the partition table in Windows, including MBR and GPT. To pinpoint this 4TB not showing full capacity issue, you're supposed to figure out only one noticeable difference between the two items. MBR supports the maximum hard drive capacity of 2TB, while GPT allows for a more flexible disk scheme of an even larger size.

How to Restore the Full Capacity of the 4TB Hard Drive

From what we explain, it's not hard to find solutions to solve the problem of the 4TB hard drive shows only 2GB or less, not showing the full capacity. We think that the best way is to convert MBR to GPT.

If you're using the Disk Management to make the conversion, you may probably face with the "Convert to GPT" grayed out.

To convert MBR to GPT without data loss, follow the two easy steps in the following:

Step 1. Download and launch EaseUS Partition Master on your Windows computer.

Step 2. Right-click the MBR disk that you want to convert and choose "Convert to GPT".

convert MBR to GPT - 1

Step 3. After that, find and click the "Execute 1 Operation" button on the toolbar and choose "Apply" to start the conversion. You need to restart your device to enable this change.

convert MBR to GPT - 2

After changing the partition table on the 4TB hard drive, it shall no longer show up less space on your computer. If there is unallocated space after the conversion, you can create a new partition on it.

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 Windows 10 is supported

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Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

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What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

About EaseUS Partition Master

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Video Tutorial

How to Partititon a Hard Drive on Windows 10/8/7