It happens that a hard drive cannot be deleted in Windows or recognized by BIOS. To use an external hard drive, you can just plug it in the computer USB port. "How to repair corrupted internal hard disk? If you missed the pop-ups or ignored them, it's not a big deal. The most direct reason why an external hard drive is not detected by computer is a broken USB port. Step 1: Open EaseUS Partition Master on your computer. If you want to create partition on hard drive in Windows Disk Management, please follow these steps: Step 1 Open Disk Management, right-click on unallocated space and select New Simple Volume option from context menu. You should try to connect the hard drive via another USB port or on another computer. The hard drive may be attacked by the virus or physical damage due to power failure or unsafe ejection and so on. Step 1 Restart computer and keep pressing the function on your computer which allows you to enter BIOS. Please note that the BIOS interface and settings, and how to enter BIOS differs from BIOS versions and motherboard brands. Alternatively, you can use third-party software to read mac formatted drive on Windows. Formatting will erase your important data. Otherwise, the drive doesn't have enough power to function. With Eassos Recovery, you can retrieve lost data within a few clicks. Easy-to-use software backs up entire system's current state, data, settings and applications to protect PC from system crash. The next thing is to check whether Windows detects the hard disk. Step 3 In the rest steps you'll be asked to set partition size, driver letter, file system type, volume label, formatting type, etc. As long as you have a hard drive running on your computer, it's only a matter of time before you get the problem. If you have one and it has an exclamation-type icon, right-click on it and click on Import Foreign Disks. Conclusion. In this issue the primary drive didn’t show up. unallocated, RAW, etc. If its heads gets damaged, and it cannot be accessed anymore. Then you can follow the onscreen instruction to create new partition and format the disk. It is necessary to click the left mouse button on the + icon. Fix hard drive not detected errors by deploying CMD You can run CMD to fix your hard drive internal errors in case it got detected in bios but failed to open on your computer. If the drive works as normal in a different USB port, you may have a dead USB port. That makes it corrupts easily, no matter an internal hard disk or external hard drive. Method 3: Partition and format the hard drive Now, try these workarounds in this article to fix the external hard disk detected but not accessible/opening issue without losing data. Thus, when you meet the problem, you need to check BIOS setup. The file or directory is corrupted and unreadable. If you have better solutions or any questions regarding this issue, please feel free to contact us. Step 3: Expand Disk drivers, find and right-click on … Hard drive contains moving physical moving components and it is relatively fragile to collision than SSD. If it is the case, we can fix the disk not showing issue by assigning a drive letter. Also, you can consult your PC's manufacturer for user manual. You should see your external hard drive listed in the window, even if it has no drive letter or displays as unallocated, unknown, not initialized, offline. Hard drive capacity is unallocated. There is something wrong with hard disk interface or power connector 3. You can initialize the disk following these steps: Step 1 Access Disk Management. Method 1: Check hard drive cable connection Hard drive not showing up is a common issue you may encounter during using computer. The next thing is to check whether Windows detects the hard disk. Disk 0 is usually the boot drive. No worries! There are two partition styles: MBR (Master Boot Record) and GPT (GUID Partition Table). external hard disk like SSD not detected on Windows, initialize and reformat external hard drives in Windows, recover lost data from the dead external hard drive. Method 5: Run hardware and devices troubleshooter If the external hard drive still cannot be readable on Mac, go on the following solutions. How to decide whether the partition is the one you need to recover? Reconnect the power cord to the system itself. In many situations, the hard drive shows abnormal behavior like the hard drive doesn’t contain any files but says its full. In some cases, even new hard drive cannot be recognized by computer. Disk 1 or Disk 2 may be the additional storage drive. Then you can follow the wizard to finish the process. Importing the Foreign disk utility; After a short while, your new HDD drive should become visible as a volume in both Disk Management and File Explorer. 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