
Please see for additional information on this particular issue.

The partition table is used to display each partition within the Operating System and if this becomes corrupted it will lead to data loss. Western Digital does not recommend multiple partitions due to potential corruption of the Partition table.Western Digital recommends that when formatting a drive that it be the only drive present on the system to limit occurences of accidental data loss. Once the process begins, ALL THE DATA ON THE DRIVE WILL BE LOST! This process is Data Destructive and cannot be undone. The instructions in the article below are designed to help repartition and format a hard drive. The instructions do not differ when formatting different capacity sizes, this is not capacity specific.Internal drives do not ship pre-formatted and will need to be Partitioned and formatted before being used.Please refer to Answer ID 25242: WD External Drive Out of Box Format & Operating System Compatibility. External hard drives come pre-formatted and ready for use.If the Security Options button is not available, Disk Utility cannot perform a secure erase on the storage device.

Secure erase options are available only for some types of storage devices. (Optional) If available, click Security Options, use the slider to choose how many times to write over the erased data, then click OK. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to erase-it’s at the top of the hierarchy.Ĭlick the Format pop-up menu, then choose a file system format. Ĭlick the Scheme pop-up menu, then choose GUID Partition Map. In the sidebar, select the storage device you want to erase, then click the Erase button.

If you want to erase any other type of storage device: Double-click Disk Utility in the /Applications/Utilities folder. Note: If you want to get your Mac ready to trade in, sell, or give away, and your computer is a Mac with Apple silicon or an Intel-based Mac with an Apple T2 Security Chip, use Erase Assistant.
