If you aren’t sure, look at the available space listed under Capacity in Disk Management. When formatting or reformatting a hard drive on Windows 10, make sure to select the correct drive. To access the Disk Management utility, click the Windows icon and type Disk Management. Some hard drives may also include drivers, firmware, or format wizards, so be sure to check the user manual before formatting the hard drive. To properly format or partition any hard drive connected to your Windows 10 computer, you will use the Disk Management tool. Here’s how to format an external hard drive for Windows 10 or partition it. You might want a drive that works with Macs and PCs, or maybe you want to partition it, which will split it up into two different formats. While most external hard drives are already designed to work for Windows computers, there are times when you need to reformat one. How to Format an External Hard Drive for Windows 10