By AOMEI / Last Updated October 28, 2019

My second hard drive not showing in Win10 Explorer

“I have newly purchased a 1TB hard drive and installed it on my computer that is running Windows 10. But the problem is that when I open File Explorer, it is not appearing when I open Disk management, it shows as unallocated. What happens? How can I make the new second hard listed in File Explorer? Is there any advice?”

Format the new hard drive with a specific file system

Obviously, the new hard drive is not appearing and can be used to save data as it not labeled with a drive letter and formatted with a specific file system. All you need to do for solving this problem is to format the new external hard drive with certain file system that is compatible with Windows 10 OS. Now, have a look at how to format a new hard drive in detail.

PS.: If your new hard drive is not initialized, you should initialize it at first.

Method 1. Format new hard drive within Windows 10 Disk Management

You can format your new hard drive in Windows using the Disk Management tool, and the specific steps are as follows:

1. Press “Windows” + “R” to open the Run box, and type “diskmgmt.msc” and press “Enter” to open the disk management.

2. Then, it will pop-up a window to notify you that you must initialize the disk before logical manager can access it. Choose the partition style you need and click “OK

3. Then the new disk will show as unallocated space. Right-click the disk and select “New Simple Volume”.

4. In the pop-up window, you can follow the New Simple Volume Wizard to format partition in your need.

Method 2. Format a new drive in Windows 10 from Command Prompt

You can also format a new hard drive from Command Prompt. Here are the detailed steps:

1. Press Windows + R, input “cmd” to open Command Prompt.

2. Type diskpart and hit Enter key.

3. Run commands as follows:

  • list disk

  • select disk n, n refers to the number of the new hard drive.

  • create partition primary

  • format fs=ntfs

  • assign letter=h

Method 3. Format a new large hard drive in Windows 10 with FAT32

If your new hard drive is larger than 32GB and you want to format it with FAT32 file system, as you want to make this hard drive become workable under different devices like Windows PC, Mac PC, etc., you can achieve this goal within Disk Management or Dikspart.

At this time, you can use a third-party format tool – AOMEI Partition Assistant Standard. It enables you to format large drive like 64GB, 128GB to FAT32 without any effort. Then, free download it and have a closer look at how to format a new hard drive in Windows 10 via AOMEI Partition Assistant Standard.

Step 1. Install and launch AOMEI Partition Assistant Standard. In the main interface, you can see your partition information. Find out the new hard drive, right-click the unallocated space on it and choose Create Partition.

Create Partition

Step 2. In the pop-up window, you can specify the size and the location of the new partition, choose the file system you need and change and change the drive letter of it. Then, click “OK” to continue.


Step 3. After that, it will back to the main interface. Preview the changes and click Apply and Proceed.



  • These steps are about how to format a new hard drive with a specific file system in Windows 10, which also can be applied under Windows 7/8/8.1. If your new hard drive has been partitioned and you want to format it to other file system, right-click it and the function “Format Partition” can help you.

  • To enjoy advanced features, such as recover deleted partition on external hard drive, convert dynamic disk into basic without data loss, etc., you can upgrade it to a higher version.