Why do we format WD Elements for Mac?
Most WD Drives come formatted in the NTFS (Windows) or HFS+ (Mac) format.
If you own a WD Elements drive in NTFS, it will be only readable but not writable on
Mac. How frustrating it is! There is a common need to make WD Elements drives usable
on both Windows and Mac so that you can transfer data between the two environments.
To achieve this goal, you are supposed to format WD Elements for Mac to FAT32 or
exFAT which is compatible on both Windows and Mac.
Format WD Elements failed on Mac, how to fix it?
However, when trying to format WD Elements for Mac, some users encounter such
errors:
The drive cannot be dismounted
This error occurs when another program or service is actively using WD Elements, such
as a file transfer to or from the drive, or security software scanning the drive for
problems. You can fix the error in following ways:
● Close all obviously open programs or files.
● Boot your computer into Safe Boot.
● Temporarily disable any anti-virus and other security software running on
your computer.
● Format the drive using another USB/FireWire/eSATA cable and on another
computer if possible.
Not enough space on device for requested operation
If the WD Elements to be formatted contains a GPT partition, Disk
Utility will produce the error: “MediaKit reports not enough space on
device for requested operation. Operation failed...” To solve this problem, you have
to erase the partition first and then format the drive with Disk
Utility. You will get a prompt that erasing WD Elements will delete all
data stored on it and cannot be undone.
When you suffer from WD external drive format failed on Mac, you must be wondering
whether there are workarounds to formatting WD Elements for Mac. The answer is
“Yes”.
Quick workarounds to formatting WD Elements for Mac
Connecting the WD Elements drive to a computer running Windows operating system, you
will get quick workarounds to formatting WD Elements for Mac. Find efficient methods
of WD external drive format for Mac here:
Note: Formatting will erase all data on the disk, please save important data by online backup or local backup beforehand.
Method 1: format WD Elements for Mac via Command Prompt
1. Hit Windows Key + X on your keyboard, and
select Command Prompt (Admin) from the menu.
2. Type diskpart and press Enter.
3. Type list disk and press Enter.
4. Type select disk # (ex: disk 2) to select the WD Elements
drive to be formatted and press Enter. You may get indication from the size of the
disk.
5. Type clean to remove all information on the drive and press
Enter.
6. Type create partition primary to create a partition and
press Enter.
7. Type format fs=exfat quick to format the partition as exFAT
and press Enter.
8. Type assign letter=# (ex: letter=G) to assign a drive
letter and press Enter.
9. Type exit and press Enter twice to exit Diskpart and Command
Prompt continuously.

Tips:
Command Prompt is unable to format a partition over 32GB as FAT32. Due to the big
capacity of WD Elements drives, you are recommended formatting them as exFAT.
Method 2: format WD Elements for Mac with a free format tool
AOMEI Partition Assistant Standard as a comprehensive partition manager can assist you in formatting
WD Elements for Mac and it is free of Command Prompt’s limitation. Learn detailed
steps below:
Step 1. Download, install and run AOMEI Partition Assistant.
Step 2. Right click the
WD Elements drive that you need to format and hit “Format Partition”.

Step 3. Reset the partition label, file system and cluster size
(smaller cluster size makes less wasting of disk space, and we usually recommend you
use the default size if you don’t know which one is better) in the pop-up window.
Select exFAT as file system here and click “OK” to confirm the changes.

Step 4. Click “Apply” to view pending operations and then “Proceed”
to commit the operations.

Notes:
● Before formatting a WD Elements external drive, you’d better back up all the
important files and data because formatting will destroy all data. The free
backup software - AOMEI Backupper Standard could
help you create a backup for those data.
● Wait for the format process to be finished before you start a new task on
your computer.
● “The volume is
too big for FAT32” problem is solved in AOMEI Partition Assistant. You are
able to format a 500GB, 1TB, 2TB WD Elements external drive to FAT32, thus
making the drive readable and writable on Mac.
● If you want to use AOMEI Partition Assistant command lines to format WD Elements external drive as FAT32, you may upgrade to AOMEI Partition Assistant Professional.
Summary
To format WD Elements for Mac, FAT32 and exFAT are recommended file system because
they are supported by both Windows and Mac. Two methods mentioned above apply to
formatting WD Passport for Mac as well. However, AOMEI Partition Assistant is
superior to Command Prompt as to FAT32 capacity requirement, let alone other
powerful functions. You are capable of fixing the error of inaccessible
boot device on Windows 10 SSD with AOMEI Partition Assistant. Give it
a shot and you won’t regret!