Samsung Portable Ssd Not Detected By Software On Mac


Sep 09, 2019  To be specific, there are most commonly seen five situations that Samsung SSD 850 EVO not detected on Windows 10. Samsung 850 EVO not detected in BIOS. This problem is kind of important because first you need BIOS to recognize it and then you can use it. Keep tapping F2, F8, or Del right after powering computer will bring you to BIOS interface.

  1. Samsung Portable Ssd Not Detected Mac
  2. Samsung Portable Ssd Not Detected By Software On Mac Pc
  3. Samsung Portable Ssd Not Detected By Software On Mac Keyboard

'Hi there, do you know how to initialize a new SSD in PC? I recently bought a new SSD, and I added to my computer, but it won't allow me to create a new partition. It keeps asking me to initialize the disk with an error message ' Disk Unknown is not initialized'. How can I fix this issue?'

Why You Need to Initialize Hard Drive/SSD

Are you having a similar problem with your SSD or HDD that the disk drive is not responding or stay with an unallocated condition? Do you know why the system keeps asking you or forcing you to initialize HDD/SSD? Here below are the reasons and causes that you are in and why you have to initialize SSD or HDD:

  • New HDD or SSD does not show up in PC

When a brand new SSD or HDD is plugged into PC, it may not show up in This PC/Computer immediately. You have to initialize it so as to make it detectable and work for storing data.

  • Disk Unknown Not Initialized error

An error message such as ' Disk 0 is unknown, not initialized, unallocated' may pop up if you try to open a solid-state disk or hard disk drive. This problem can occur to all Windows systems, including Windows 10/8/7, and the only way is to fix 'disk not initialized' error.

  • Logical Disk Manager cannot access a disk since it's not initialized

Sometimes, if a hard disk or SSD is not initialized into MBR or GPT, the system may warn you with an error message 'You must initialize a disk before Logical Disk Manager can access it'.

How to Initialize SSD/HDD in Windows 10/8/7 (3 Ways)

If you add a brand new disk to your PC and it doesn't show up in File Explorer, you might need to add a drive letter or initialize it before using it. There are three ways to initialize SSD or HDD in Windows 10/8/7.

If your disk already has files on it that you care about, don't initialize it - you'll lose all the files. You can export data with data recovery software. Then, initialize the disk by the following steps.

Solution 1. Initialize SSD/HDD with Free Software

You can initialize a disk easily and quickly with the help of EaseUS Partition Master Free. This free partition tool enables you to initialize a hard drive or an SSD with simple clicks. What's more, it is a superior free tool designed for everyone to manage partitions in Windows without data loss: beginners and experts alike.


  • Resize/move partition
  • Merge partitions
  • Wipe disk data

Follow the steps below to initialize HDD/SSD:

Step 1: Download the software

Download EaseUS Partition Master. Connect the hard drive or SSD to PC.

Step 2: Initialize your HDD/SSD

Right-click the target HDD or SSD and select 'Initialize to MBR' or 'Initialize to GPT' accordingly.

Fig 1. Initialize to MBR:

Fig 2. Initialize to GPT:

Step 3: Apply the operation

A pending operation of initializing disk to MBR or GPT disk will be added. Execute the operation and click 'Apply'.

Solution 2. Initialize SSD/HDD in Windows 10/8/7 with Disk Management

Here's how to initialize a new disk using Disk Management.

For Windows 10/8 users:

Step 1. Press 'Win + R', type diskmgmt.msc. and click 'OK' to open the Disk Management tool.

Step 2. Find the HDD or SSD that you need to initialize and right-click on it, and select 'Initialize Disk'.

Step 3. In the Initialize Disk dialog box, select the correct disk to initialize. And then click 'OK' to accept the default partition style, or you can change the partition style (GPT or MBR) as you want.

After this, reboot PC to keep all changes, and then your disk can be used properly.

For Windows 7 users:

Step 1. Right-click Computer and select 'Manage' to open Disk Management.

Step 2. Right-click on the not initialized disk (HDD or SSD) and select 'Initialize Disk'.

Step 3. Select the disk(s) to initialize in the Initialize Disk dialog box and set the disk partition as MBR or GPT. Address book software free mac.

Reboot PC, and then your disk will be initialized to create new partitions on it for storing new data.

Solution 3. Run CMD to Initialize HDD or SSD

If you are familiar with Command Prompt, you can try this method. Again, back up data into another safe disk or external storage device if you have important data on it.

Step 1. Press Win+R and type: diskpart and hit 'Enter'.

Step 2. Type the following commands in Command Prompt and press Enter after each command.

If you want to initialize to MBR disk, in the command, input convert mbr instead of convert gpt, then, you've finished the disk initialize process with the above commands.

Also read:How to Fix Disk Unknown Not Initialized Error.

How to Initialize SSD/HDD on Mac

If you are a Mac user, you can also initialize your disk. This guide uses Mac OS X El Capitan or later. The procedure may be different from other OS versions.

Step 1. Connect your SSD to Mac with a USB adaptor. Select 'Initialize' when you receive this message - The disk you inserted was not readable by this computer.

Step 2. Disk Utility will pop up if not, open Disk Utility and you shall see the SSD listed under External

Step 3. Select the SSD and then select 'Erase' on top of disk utility

Step 4. Input your desired name of the partition, if you plan to install Mac OS onto the partition, choose OS X Extended(Journaled) as the format. Choose GUID Partition Map as Scheme. After you click 'Erase'.

The SSD should now be visible on your desktop with the new name you gave it, as well as during the drive selection menu if you run an OS X installer.

Additional Information About Partition Styles - GPT and MBR

When you initialize a disk, you have to choose your partition style - MBR or GPT. MBR and GPT are two accessible partitions styles on Windows-based computers. Disks can be divided up into multiple parts called partitions. Each partition has to have a partition style - GPT or MBR. Windows uses the partition style to understand how to access the data on the disk. You can know their differences in detail in this table. What's more, you can convert MBR to GPT or GPT to MBR according to your needs.

ComparisonMBR (Master Boot Record)GPT (GUID Partition Table)
Supported Partition NumbersMaximum 4 partitions.Maximum 128 partitions.
Supported Disk Capacity2TB (for 512B sector), 16TB (for 4Kn sector)No disk capacity limit
Supported Boot ModeBIOSUEFI
Supported OS
  • Windows 10/8/7, Linux
  • Windows Server 2016/2012/2008
  • Windows XP/Vista (64bit for data only)
  • macOS and modern Mac OS X
  • Windows 7/Windows XP/Vista


Initialize SSD is one of the essential tasks. Knowing how you can initialize SSD on Windows and Mac can solve the uninitialized issue with ease. Initializing SSD and HDD in Windows 10, 8, and 7 is possible using free software, Disk Management, and DiskPart. It only takes a few steps to complete this process.

SSD Initialization Related Questions

Here are some related questions about SSD initialization. If you still have a problem, you can read on to get additional help.

How do I initialize my new SSD?

To initialize a new SSD:

Step 1. Download EaseUS Partition Master. Connect the hard drive or SSD to PC

Step 2. Right-click the target HDD or SSD and select 'Initialize to MBR' or 'Initialize to GPT'.

Samsung portable ssd not detected mac

Step 3. Execute the operation and click 'Apply'.

Do I need to initialize SSD?

When a brand new SSD or HDD is plugged into PC, it may not show up in This PC immediately. You have to initialize it so as to make it detectable and work for storing data.

How do I initialize my Samsung SSD?

To initialize Samsung SSD in Disk Management:

Step 1. Press Win + R, type diskmgmt.msc. and click OK to open the Disk Management tool.

Step 2. Find the HDD or SSD that you need to initialize and right-click on it and select Initialize Disk.

Samsung Portable Ssd Not Detected Mac

Step 3. Select the correct disk to initialize. And then click OK.

Consider a situation where you enter system BIOS to change the boot sequence. Upon entering BIOS, you realize that the internal SSD is not showing up. There are many possible reasons for this to occur such as a faulty data cable or a faulty SSD. Here, in this article, we cover the reasons for this error and potential solutions to resolve the same.

Solution 1: Enable drive in BIOS

If your hard disk is not being detected in BIOS, it is possible that the drive has not been set up yet. To set up the drive, follow the steps below.

  1. ‘Restart’ your computer and press the ‘F2’ key or any key according to your PC

Samsung Portable Ssd Not Detected By Software On Mac Pc

Note: Different PC manufacturers use different keys to enter system BIOS. If you have a Dell, F2 key is normally used to enter BIOS. Find out the key on your computer to enter BIOS and hit that particular key.

  1. This will open the ‘system BIOS’; go through the system documentation to check if the hard drive is turned ‘OFF’
  2. If it is ‘OFF’, turn it ‘ON’ in system setup
  3. After you have turned it ‘ON’, restart your computer and enter ‘BIOS’ again to check if your drive is detected and the problem is resolved.

If the drive is still not detected, there is a possibility that your drivers are not updated. To update drivers, go to the next step.

Solution 2: Update drivers

If the device drivers in your system are out-dated, there are chances that the hard drive may not be detected. To update device drivers, you can follow the steps below.

  1. Click on the ‘Start’ menu and search for ‘Device Manager’ and hit ‘Enter’
  2. Open ‘Device Manager’ and identify your hard drive from the list
  3. Right click on the hard drive and select ‘Update drivers’
  4. Then select ‘Searchautomatically for updated driver software’

Samsung Portable Ssd Not Detected By Software On Mac Keyboard

This will update the device drivers automatically. However, if this doesn’t help, you can also try ‘uninstalling the drivers’. To do this, right click on your hard drive, click on ‘Uninstall’ to uninstall drivers. Then restart your system and this will automatically ‘reinstall’ drivers for you. Now enter ‘BIOS’ and check if the drive is being detected. If not, proceed to the next step.

Solution 3: Replace data cable

Your SSD will not be detected if the data cable is damaged. It’s hard to say if the cable is damaged just by looking at it externally. So, the easiest way to check if the cable is faulty is to replace the cable and check your SSD is being detected.

Solution 4: Check for issues with SSD

If none of the above methods work, it’s possible that your SSD is faulty. Faulty or damaged SSD can be a result of many reasons such as temperature and ventilation to the drive, large number of bad sectors etc. In this case, you may need to examine further to debug the issue.

If your drive is severely corrupt or has bad sectors, formatting it may resolve the issue in some cases. A downside to formatting is that all data will be lost. If you have a backup, well and good! However, if your data is lost and there is no backup, Remo Recover is a great choice to recover data from formatted SSD’s.

It scans your formatted SSD and restores all your data in only a few minutes. Refer SSD data recovery for more details.

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