![Software Software](https://mocnykomputer.pl/userdata/public/gfx/12880/SPC197-06.jpg)
Select the External Hard Disk that at the left column i.e your Maxtor External HD; Click on the Erase tab; At the “Volume Format” select “Mac OS Journaled/Extended” If you confirm to format your hard disk, Click on “Erase” button. If the erase process finished, your external hard disk is ready to use for your Mac. The Seagate Portable External Hard Drive is a great external hard drive for Mac that is also very affordable, making this a primary choice for those who need a lower cost drive. Not only is this hard drive affordable, but it is also very simple to use.
It sounds as though it has failed.
I don't know if Seagate has a test utility suite for those on their website, but they often require windows to test their drives.
If it is under warranty, then I would investigate further with their tools.
![Seagate Seagate](https://datarecovery.com/wp-content/uploads/2015/09/seagate-blackarmor-nas-440-and-420.jpg)
Seagate Expansion Software Download
If not, others here may be able to offer additional troubleshooting.
How To Use Seagate Backup
Are you using their bundled software at all? If so, try uninstalling it, then reformat the drive by using the Partition tab.
If you think it might be something on your Mac (or a problem with it), can you try the drive on another computer?
Aug 27, 2014 7:02 PM