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Summary

Here is a step-by-step guide for you to fix Seagate external hard drive not showing up in My Computer in Windows 10. Providing that data is valuable, we suggest you try fixes first to make the disk show up in Disk Management, and next take one more step to recover data on the unrecognized Seagate external hard drive with the help of EaseUS Data Recovery Wizard.

'My 320 GB Seagate external hard drive is detected but not showing up in My Computer. What should I do? In Device Manager, it gets detected and in disk management, it shows up as 'unallocated'. Is there any way to fix the issue? If I initialize it, will I lose all the data on the drive? I'm using Windows 10.'

How to fix Seagate external hard drive not showing up in Windows 10

Sometimes, when you plug in your Seagate external hard drive to PC, it cannot be recognized by your PC. As a result, the disk and the folders & files on it then become inaccessible. Actually, there are not the few have experienced such an issue of Seagate external hard drive not showing up in Windows 10 Computer. Next, we will show you how to fix the issue without losing data.

1. Make Seagate external hard drive show up in disk management

The first thing you need to do is to check if it is showing up in disk management. If yes, you can skip to the next step. And if not, you should first update the disk driver to make the Seagate external hard drive recognized by Windows and show up in disk management.

Step 1. In Run (Windows + R), type devmgmt.msc and hit Enter.

Step 2. In Device Manager, next to Universal Serial Bus controller, click '+ (plus)'. Then you'll see a yellow exclamation mark. Right-click and choose update driver software.

Step 3. Click 'automatically search for driver software online...'

Step 4. After the process completes, restart your computer and the driver should be automatically installed and loaded in your computer.

Mac

Step 5. Go to Windows Disk Management (This PC > Manage > Disk Management), check if the Seagate external hard drive shows as a normal hard disk there.

Sometimes, even the hard drive shows up in Disk Management, it's with strange characters like Unallocated, RAW, disk unknown not initialized, etc. It's detected but not accessible, so this time you must perform data recovery on the hard drive without delay.

2. Recover data from the Seagate external hard drive which is showing but not opening

When you see the Seagate external hard drive listed in the Disk Management window, you can try EaseUS disk data recovery to retrieve your data. It works well on external hard drive data recovery even when the disk is not opening in your Computer.

By going through three short stages, you can easily find lost data on a Seagate external hard drive.

Step 1. Under the 'External Devices', you should see the Seagate external hard drive showing up after it's correctly connected to your computer. Select the drive and click the Scan button.

Step 2. Soon, the software will find more and more data and display the data in the scan results.

Step 3. You can use the Filter feature to quickly locate some specific file types in the results. Select the target files and click the Recover button.

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3. Reformat and partition Seagate external hard drive to make it show up in Computer

After Seagate external hard drive recovery, you can then reformat and partition the disk to initialize the disk and make it show up in your computer without losing data.

Step 1. Go to This PC > Manage > Disk Management, right-click the disk partition you need to format and then choose Format.

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Step 2. In the pop-up window, you can set file system and cluster size and then click OK.

Note: If you also happen to encounter the flash drive not showing up on Mac, here is the access for online help.

Backing up your Mac is simple and important. We recommend it for everyone.

Back up with Time Machine

Time Machine is the built-in backup feature of your Mac. It’s a complete backup solution, but you can use other backup methods as well.

Create a backup

Store files in iCloud

You can also use iCloud and iCloud Drive to store files, such as your photos, documents, and music.

Set up iCloud and iCloud Drive

Restore your Mac from a backup

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When you have a backup, you can use it to restore your files at any time, including after the original files are deleted from your Mac.

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Prepare your Mac for service

Making a backup is an important part of preparing your Mac for service, especially because some types of repair might require erasing or replacing your hard drive.

Seagate backup plus drive for macGet your Mac ready for service

How much space do I need for a backup?

To see the size of a specific file or folder, click it once and then press Command-I. To see storage information about your Mac, click the Apple menu in the top-left of your screen. Choose About This Mac and click the Storage tab. For Time Machine backups, it's good to use a drive that has at least twice the storage capacity of your Mac.

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