Here is a excellent guide to Format Seagate External Hard Drive Windows 10, Simply follow the steps on this page & do as per the steps to Format Your Hard Drive. However, it is a good idea to take several precautions before wiping out the entire data so that the personal and private data will not be recovered by unauthorized persons, especially if an old hard drive is sold or discarded. In this guide, we will see the how to Format Seagate External Hard Drive Windows 10 computers.