How to Convert a WD External Drive to Apple File System (APFS) Format


Converting External Drive to APFS format

IMPORTANT Important:

APFS formatted volumes can be read by a macOS High Sierra (10.13), but not by a macOS Sierra (10.12) or earlier.
For more information, please refer to Apple KBA ID HT208018 - Prepare for APFS in macOS High Sierra.

If the following message occurs during the format procedure, MediaKit reports not enough space on device for requested operation. Operation failed..., please refer to Answer ID 20789: macOS Disk Utility Error "MediaKit reports not enough space on device for requested operation"


The following steps will help you convert your external drive into Apple File System known as APFS.

  1. Open disk utility on your macOS 10.13 High Sierra
  2. Connect a WD external drive into a USB port on the computer
  3. Click on Show All devices

  4. Image


  5. Highlight the drive volume (Left side window pane) and click the Partition button

  6. Image


  7. Ensure the scheme is set to GUID Partition Map and select the format from the drop-down menu Mac OS Extended Journaled is selected

  8. Image


  9. Click the Apply button

  10. Image


  11. Click the Partition button

  12. Image


  13. Right click (Control + Click) on that partition of the drive My Passport or No Name

  14. Image


  15. Select Convert to APFS

  16. Image


  17. Please wait during conversation process. A check-mark will appear on the successful completion. Click Done

  18. Image


  19. Right click (Control + Click) on drive My Passport from the desktop
  20. Select Get Info
  21. Under general you will see Format: APFS

  22. Image


In case the answer did not answer your question, you can always visit the WD Community for help from WD users.

Please rate the helpfulness of this answer