If your Seagate Backup Plus 1TB Slim portable drive is not detected by your Windows computer, the issue might be with the USB cable, USB port, or the computer itself. You can try a different USB cable, port, or computer to handle this problem. Sometimes, removing the USB hub can fix this problem effectively. If you cannot solve the problem yet, try out the advanced troubleshooting methods listed in this article.
CHECK YOUR DRIVE'S STATE
Before trying the troubleshooting methods, you need to check your drive's state in the Disk Management section and act accordingly.
Open the Run box (Windows + R).
Type diskmgmt.msc and click OK.
Check your hard drive's state when directed to the Disk Management section.
If your hard drive doesn't appear in the Disk Management section, you need to update the corresponding drivers.
If it shows as RAW or Unallocated, you need to format your hard drive.
If your Seagate Backup Plus has the same drive letter as other disk partitions, it will not show up on your computer. In that case, you need to change your Seagate drive letter.
Diagnose the exact issue with your hard drive and implement the steps listed in the following sections.
UPDATE THE DRIVER
Connect your Seagate Backup Plus external hard drive to your computer.
Open the Run box, type devmgmt.msc, and click OK.
When directed to the Device Manager section, expand Disk drives.
Right-click on your external hard drive and then select the Update driver option.
On the following screen, click Search automatically for updated driver software.
Once the process gets concluded, restart your computer and check if your Seagate external hard drive shows up on your computer.
FORMAT YOUR HARD DRIVE
Connect your Seagate Backup Plus hard drive to your computer.
Open the Disk Management section.
Right-click on your external hard drive and then choose the Format option.
When the Format dialog box pops up, enter your drive name in the Volume label field.
Select the file system just as you prefer. Choose the exFAT file system if you want to use your hard drive on Windows and Mac computers. If you don't want to use your drive on Mac, you can select the NTFS file system.
Leave the Allocation unit size field as Default, check the Perform a quick format box, and click OK.
Once your hard drive is formatted, see if it is detected by your computer.
CHANGE THE DRIVE LETTER
If your Seagate hard drive letter is the same as other existing drives, it will not show up on your computer. Instead, it appears as New Volume in the Disk Management section.
In that instance, change your external hard drive letter. To do it, right-click on New Volume and select the Change Drive Letter and Paths option.
Now, assign a different letter to your Seagate drive and check if it shows up on your computer.
These are some of the best troubleshooting solutions to fix the Backup Plus 1tb Slim Portable Drive Not Detected problem. If you need assistance in resolving this problem, you can reach our technical support without any hesitation.