The System Information app has been included with Windows since before Windows XP. It provides a much more detailed look at system information than you can get just using the Settings app. To open up System Information, hit Windows+R, type “msinfo32” into the “Open” field, and then hit Enter. From the System Information menu, simply select the file or app you want to get rid of, and select the ‘delete’ button on the bottom right of the window. But these two methods often don’t solve the issue! One clever way to better manage the storage on your Mac is to use cloud storage options like iCloud, Dropbox, Google Drive, and OneDrive.

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Choose Apple menu  About This Mac, then click Storage. Each segment of the bar is an estimate of the storage space used by a category of files. Move your pointer over each segment for more detail. Click the Manage button to open the Storage Management window, pictured below. The ability to generate system reports via the command-line using systemprofiler provides a level of flexibility that System Information cannot, such as generating or scheduling reports on remote Macs via SSH. This can be advantageous when trying to determine what software is installed on which Mac or if any users are running an outdated.

Is your Seagate external hard drive not working? This page covers complete solutions to fix Seagate and other brands of external hard drive not working, not detected, or not showing up error, making your hard drives work again without losing any data.

Quick Tips to Fix Problematic Seagate External Disk:

• 1. Try a different USB port on the computer.
• 2. Switch a new cable if the current one is damaged.
• 3. Try connecting the drive to a different computer.
• 4. Verify if the drive's light is on. (Light off indicates the power adapter is not connected to power.)
• 5. Try a different power outlet. (Desktop Drives)

After following these tips, if your Seagate external hard drive is still not detected, move on and try the other solutions offered here.

Applies to: Fix Seagate external hard drive not showing up, not detected, external hard drive light blinking but not work, not recognized in Windows 10, USB not showing up, etc.

8 Ways to Fix Seagate External Hard Drive Not Working in Windows & Mac

Follow to pick the right method and follow to make your Seagate external hard drive work again.

#1. Uninstall/Re-install Seagate Drive Driver...Full steps #2. Format RAW Seagate Hard Drive...Full steps #3. Create New Partition on Unallocated Seagate...Full steps #4. Change Seagate Drive Letter...Full steps #5. Turn on USB Root Hub...Full steps

#1. Repair Seagate External Drive in First Aid...Full steps #2. Format Seagate to macOS Supported Format...Full steps #3. Remount/Reformat Seagate External...Full steps

As some of these solutions may cause file loss issues, in this case, we'd like to recommend you restore data from the not working Seagate external hard drive first.

Before You Start: Recover Data after Not Working Seagate External Drive First

Here reliable hard drive data recovery software - EaseUS Data Recovery Wizard with its reliable features can bring all your lost files back immediately.

For a Mac user, download the Mac version to restore lost files.

EaseUS Data Recovery Wizard

• Recover lost or deleted files, documents, photos, audio, music, emails effectively.
• Recover files from formatted hard drive, emptied recycle bin, memory card, flash drive, digital camera, etc.
• Support data recovery for sudden deletion, formatting, drive corruption, virus attack, system crash, etc.

Step 1. Locate Seagate drive to scan

• Use the correct USB cable to connect the Seagate external hard drive to your Windows PC.
• Run EaseUS Data Recovery Wizard, it will load the external drive and display it under the Devices section.
• All you need to do here is to select the Seagate external hard drive and then click the Scan button.

Step 2. Check for the scan results

As soon as the scan process starts, the software will find more and more lost data on the selected drive and display the data in the scan results. You can find the desired files by following its original path from the leftside tree-view pane, or filter a specific file type like Pictures, Word/Excel/PDF documents, videos, etc.

Step 3. Preview and recover

A double-click on a file lets you preview its content. If the preview is with no problem, just select the target files and click Recover. To avoid data overwriting, we suggest you save the recovered data to the other drive instead of the original Seagate drive.

To recover Seagate external hard drive data on Mac, follow this link External Hard Drive Data Recovery on Mac for help.

How to Fix Seagate External Hard Drive Not Working in Windows

Now please first open disk management to check the state of your external hard drive and refer to the right solutions as presented below for help:

Fix 1. Uninstall and Re-install Seagate Hard Drive Driver

Risky Level: Low

Difficulty Level: Easy

If your hard drive is not detected on either the device manager or the disk management, you just need to uninstall and update the Seagate drive driver and try again. Here are the detailed steps.

Step 1. Connect the not working Seagate external hard disk to PC.

Step 2. Type device manager in the search box and click 'Device Manager' on the menu.

Step 3. Expand disk drivers and right-click on your external hard drive, select 'Update Driver'.

Step 4. Select 'Search automatically for updated driver software' and restart the PC when the process completes.

Fix 2. Format RAW Seagate External Hard Drive to NTFS

Risky Level: High. Data may get lost after formatting.

Difficulty Level: Easy

On the device manager or the disk management on your computer, if your external hard drive shows as RAW or Unallocated, it means you need to format your hard drive.

Step 1. Connect the Seagate external hard drive to your PC and open Disk Management.

Step 2. Right-click on the not working RAW drive and select 'Format'.

Step 3. Set volume label, set NTFS as the file system, and tick 'Quick Format'. Click 'OK' to start the formatting.

Fix 3. Restore Partition or Create a New Partition on Unallocated Seagate External Disk

Risky Level: Medium, data may get overwritten by creating a new partition.

Difficulty Level: Easy

When your external hard drive shows as unallocated in Disk Management, you have two options: 1. To restore the partition; 2. To create a new partition.

#1. Restore Lost Partition and Data from Seagate Unallocated Space

Your first choice is to directly apply the partition recovery software for help. It will scan and recover all lost partition and data from the unallocated space.

Step 1: Run EaseUS Partition Recovery on your PC.

Select the disk or device where you lost partition(s), click 'Scan' to continue.

Step 2: Wait for the scanning process to complete.

Let the program scan the selected disk and find the lost partition(s).

Step 3: Preview and restore the lost partition(s).

Double-click on the partition which is marked as 'Lost' with 'Good' recoverability.

Preview the content of the lost partition. Click 'OK' and click 'Proceed' to start restoring the lost partition.

Step 4: Click 'Recover Now' to finish the partition recovery process.

Note: If the program warns you that there is a conflict, back up the listed partition with essential data to an external hard drive first. Then execute the final operation to restore your lost partition.

#2. Create a New Partition on Unallocated Seagate External Disk

Note: This method could also lead to data loss, remember to recover data first if you want to apply.

Here is how to use Disk Management to create a new partition with the following steps:

Step 1. Connect the unallocated Seagate external hard drive to PC and open Windows Disk Management.

Step 2. Right-click on the unallocated partition and choose 'New Simple Volume...'.

Step 3. Set partition size, drive letter, and file system such as NTFS, etc., click 'OK' to confirm.

Step 4. Click 'Finish' to complete the process.

Fix 4. Change Seagate Drive Letter

Risky Level: Low

Difficulty Level: Easy

If your external hard drive shares the same drive letter as your disk partition, Windows won't show the drive letter of your external device. It will show as New Volume in Disk Management without a drive letter.

And this is why your external hard drive not detected. To fix this issue, you'll need to add a new drive letter to your Seagate disk. Here are the steps:

Step 1. Connect Seagate external to computer and open Disk Management.

Step 2. Right-click the partition of not working Seagate disk and choose 'Change Drive Letter and Paths...'.

Step 3. Set a new drive letter to the Seagate disk and click 'OK' to confirm.

Fix 5. Turn on USB Root Hub

Sometimes, USB external hard drive devices may stop functioning correctly with multiple devices connected to the same USB hub, going into selective suspension.

You can enable the USB root hub, letting the controllers recover the USB port from its unresponsive condition so to make your device work normally again:

Step 1. Connect not working Seagate external hard disk to PC.

Step 2. Open Device Manager and expand 'Universal Serial Bus controllers'.

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Step 3. Right-click USB Root Hub > Click 'Properties' > 'Power Management'.

Step 4. Uncheck 'Allow the computer to turn off this device to save power' and restart the PC.

You May Also Interest In:

If you are having a similar issue on your hard drive, you may directly try the fixes below.

Are your hard drives, be it new or old, internal or external, not showing up in File Explorer or Disk Management? Follow to learn how to make your hard drive showing up again in Windows 10/8/7 without losing data.

How to Repair Seagate External Hard Drive Not Working/Detected in Mac [3 Methods]

Follow to repair the Seagate hard drives to work normally again on Mac:

Before you go further, try the quick fixes first:

• Seagate drive is not showing on desktop: check Disk Utility: open Finder > Applications > Utilities > Disk Utility.
• Seagate disk is not detected in Disk Utility: see the System Information/System Profiler section.
• On macOS 10.13 or higher, click 'View' in the upper left and select 'Show All Devices'.

If all the attempts failed to display your Seagate external hard drive on Mac, try the below 3 methods.

Fix 1. Repair Not Working Seagate External Hard Drive in First Aid

Risky Level: Low

Difficulty Level: Easy

If the Seagate drive is unmountable or the Mount icon is greyed out, it will prevent your Mac from recognizing or detecting the drive correctly. You can repair the problematic drive in the built-in First Aid utility.

Step 1. Open Finder and click 'Applications'.

Step 2. Locate Disk Utility in 'Utilities' and double-click to open it.

Step 3. Select the unmountable Seagate external hard drive in the left sidebar and choose 'First Aid' at the top.

Step 4. Click 'Run' to repair this Seagate hard drive and click 'Done' to finish.

If Fix 1 fails to work, you may try to format the Seagate disk in Fix 2 or Fix 3.

Fix 2. Format Seagate Disk to macOS Supported File System

Risky Level: High. data will get lost due to formatting.

Difficulty Level: Easy

If you use an NTFS Seagate external hard drive on a Mac computer, it won't work nor show up on Mac as Mac only supports APFS, FAT32, exFAT, etc., formats.

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To fix the Seagate external hard drive not working error, you can format the drive to FAT32 or exFAT. Here is a step-by-step guide:

Step 1. Connect the Seagate external hard drive to Mac.

Step 2. Go to the Apple menu, click 'Go' and select 'Applications'.

Step 3. Double-click to open Utilities, locate 'Disk Utility' and double-click to open it.

Step 4. Select the Seagate disk, click 'Erase'.

Step 5. On the Format pop-up window, set a new format like 'MS-DOS (FAT)' and click 'Erase'.

Once the formatting process completes, you can view and access the Seagate external disk on your Mac again.

Fix 3. Remount and Reformat Unmounted Seagate External Disk

If the file system on your Seagate hard disk is corrupted and it's not mounted corrected on Mac, it won't work nor be detected. In this case, remounting and reformatting the Seagate drive is the most instant way to revive it.

Follow the steps below carefully to learn how to make the Seagate external hard disk work again on Mac:

Step 1. Go to Applications > 'Utilities' > Double click and open 'Disk Utility'.

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Step 2. Select the 'Untitled' Seagate drive, and click 'Mount'.

Once the mounting completes, you'll see the Seagate drive shows up on the left pane.

Step 3. Select your Seagate external hard drive on the sidebar, choose 'Erase'.

Step 4. Rename the drive, choose the format as MS-DOS (FAT). Then click 'Erase'.

After trying the above-presented methods, you should be able to use Seagate external hard drive on both Windows and Mac computers.

Why Is Seagate External Hard Drive Not Working/Detected

Generally, 'Not Working' is a state that usually describes a malfunctioning hard disk or external hard drive. And Seagate external hard drive not working or not detected issue is top concerned among worldwide Seagate users.

So, what caused your Seagate external hard drive to stop working or malfunctioning? Both software and hardware issues may cause a hard drive not working as usual. Here is a list of commonly explored reasons related to this issue:

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• Incompatible file system
• File system corruption, Invalid file system, RAW
• The drive turns to unallocated
• Disk drive letter conflict
• Hard drive driver is corrupted or out of date
• The hard drive has too many bad sectors
• The hard drive is damaged, dead, not spinning up

Fixing Not Working Seagate Drive Is Possible, It's Your Turn

On this page, we offered 8 respective solutions to repair the not working Seagate external hard drive on both Windows and Mac computers. If some fixes may cause file loss, you can retrieve all precious data with the EaseUS file recovery solution.

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Also, we explained why is your Seagate external hard drive suddenly doesn't work or not detected by Windows or Mac computers. As your data matters, creating a regular backup of your external disk data is also useful. Fixing Seagate external hard drive not working error is possible, take steps to make your drive work now.