From the File System drop-down menu, select exFAT.Right-click on its primary partition and choose Format.Find your external drive listed in the lower half of the window.Click the matching result to launch the Windows Disk Management utility.Type Create and Format Hard Disk Partitions.Connect the drive to your PC and launch the Start Menu.You can now drag or copy your files from the external drive to your PC.Connect the drive to your PC and launch File Explorer to access the drive.Use Finder to drag-and-drop files and data from your Mac to the external drive.Once the process is complete, the drive is mounted in Finder.Name the drive as desired, use the Format drop-down menu to select exFAT, and click Erase.Choose Erase from the list of icons near the top of the window.Launch the Disk Utility application and select the external drive as the source.Once that’s done, you can format the drive to exFAT in macOS or Windows. If it’s not a brand-new drive, formatting it erases all existing files. Before you format an external storage device, first back up any data on the device.