How can I recover data from a Seagate external hard drive that may be damaged? My computer no longer will even recognize the drive.
How do you know the drive is damaged? Have you tried a different interface cable between the external drive and your computer?
If you have access to another computer, try to see if it will recognize the external hard drive.
how to recover partition table using Test Disk-Using GPArted live disc
Can you see the drive under Device Manager or Disk Management? If not, it is probably the converter board on the external drive. In that case, you can remove the drive from the enclosure and attach it internally in your computer or use a USB-to-SATA adapter.