You can’t access and open it, if your external hard drive is not showing up or recognized in Windows 10 File Explorer. The problem can be caused by various elements and you can try to fix it with the effective ways offered in this post.
By Bryce / Last Updated February 11, 2020
With large capacity, External hard drive, also called portable hard drive, is always used to store or back up data. In most case, external hard drive or second hard drive will present automatically after connected to your computer. However, it is possible that the external hard drive not showing up in Windows 10 File Explorer or “This PC”. Then, you won’t be able to open it to use the files stored on it.
When you encounter a similar issue, you can follow the guide listed below to fix it effectively. First of all, let’s open Disk Management to see the condition of this hard drive. And you can take corroding solutions if it is showing up in Windows 10 Disk Management or not appearing in Disk Management.
▶ Condition 1. Extern hard drive not appearing in File Explorer but showing in Disk Management
▪ Solution 1. Assign a drive letterh
▪ Solution 2. Initialize external hard drive
▪ Solution 3. Rebuild MBR without data loss
▶ Condition 2. External hard drive not showing up in Disk Management
▪ Solution 1.Check Windows driver via Device Manager
▪ Solution 2. Examine USB port and enable USB Device in BIOS
▪ Solution 3. Diagnose the external hard drive
Press “Windows”+ “R”, type “diskmgmt.msc” and hit “Enter”, you will access Disk Management interface. When the hard drive is not showing up in File Explorer but appears in Disk Management, you can try the following methods.
Solution 1. Assign a drive letter to the external hard drive
When the external has no drive letter, it will be invisible in File Explorer. At this time, you should assign a drive letter. Firstly, right click the partition that doesn’t have a drive letter and choose “Change Drive Letter and Path...” Then click on “Add”, choose a drive letter and click “OK” to give it a drive letter. After that, you can access the hard drive from File Explorer.
Solution 2. Initialize external hard drive
When the external hard drive is not initialized and appears as an unallocated space or without showing disk capacity, you can initialize it as follows:
1. Right click the hard drive that needs to be initialized
2. Select “Initialize Disk” and set the disk partition style as MBR or GPT.
3. Right click the disk and choose “Create New Simple Volume”.
Notice: As initialization will cause data loss, you’d better backup all the important data on the external hard drive before initializing it.
Solution 3. Rebuild MBR without data loss
It is well-known that MBR or Master Boot Record is essential to a hard drive. When it is damaged by some accidents such as virus attacks or inappropriate operation, the hard drive might display as unknown and not initialized external hard drive in Disk Management. Under this case, what you should do is to rebuild MBR via reliable and software - AOMEI Partition Assistant Standard.
First of all, free download AOMEI Partition Assistant Standard. Install and fire up it. Then you can follow the steps to rebuild MBR on the external hard drive.
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Step 1. Right click the uninitialized disk and choose “Rebuild MBR”.
Step 2. Set the type of MBR based on your current operating system. Then, click “OK”.
Step 3. Click on “Apply” to implement this operation.
Note: You can get more advanced functions, like recoverig lost partition on external hard drive, converting system disk from MBR to GPT without data loss, if you upgrade it to Professional version.
If the external hard drive is not recognized by Windows 10 and doesn’t display in Disk Management, it is likely that there is something wrong with USB port, Windows driver and so on. To solve the problem external hard drive not showing up in Disk Management on Windows 10, you have to take specific steps based on different situations.
Solution 1. Check Windows driver via Device Manager
When Windows 10 Disk Management doesn’t list the external drive, you can check whether there is a driver problem on Windows via Device Manager.
1. Press “Windows”+ “R”, enter “devmgmt.msc” and hit “Enter”.
2. Click “Disk Drives”; if the external hard drive is with a yellow exclamation mark, it is problematic.
3. Right-click the problematic drive, select “Properties”, and read the message carefully.
4. To fix such error, under Driver table, click on “Update driver” to install updated drivers. Or you can click on “Uninstall” to uninstall the driver and restart your computer; after rebooting, the driver will be automatically reinstalled and reconfigured.
Solution 2. Examine USB port and enable USB Device in BIOS
If you can’t find out the external hard drive even in BIOS, it might be caused by disabling interface in BIOS. Thus, you can enter BIOS to enable the USB device. Then restart your computer to see whether the problem is solved. If you still can’t see the drive in BIOS, you can check the USB port is “OK”.
First of all, you need to unplug the external hard drive and plug it into another USB port to see if it works. If you have connected the drive via USB hub, connect it to computer itself. Then, if you can see the drive in Disk Management but not in This PC, you take measures narrative in previous part.
3. Diagnose the external hard drive
Having done all of these, if the problem external hard drive not showing up in Disk Management Windows 10 still exists, don’t hurry to abandon the external hard drive might be dead. You can employ professional hard drive diagnostic software to check if you have to replace this external hard drive.
If the external hard drive's file system is corrupted or incompatible with Windows 10 , it won't be accessible even it shows up in File Explorer. If you open it, you can receive an error, like "X drive is not accessable access is denied". In such case, you can format external hard drive to certain file system compatible with Windows system.
The tool mentioned above, AOMEI Partition Assistant Standard will be a nice solution. It allows you to format external hard drive like Samsung and WD external hard drive etc. to FAT32 without the limitation of 32GB in partition size, exFAT or NTFS effortlessly. The detailed steps are as follows:
Step 1. Run AOMEI Partition Assistant Standard. Right click the external hard drive partition that you need to format and choose “Format Partition”.
Step 2. Choose one file system compatible with Windows system and click “OK”.
Step 3. Review the operation and click “Apply” to implement it.
Warning: Formatting external hard drive partition will delete all data on it. If there is any important data, you’d better backup or transfer it to somewhere before formatting.
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