Getting the Drive is not accessible.
Access is denied glitch notice when trying to access WD My Passport?
Identifying the cause behind this problem is critical to solving it more specifically and quickly.

Read on to get details.
External hard drive shows unallocated?
Now read this post to see how to fix unallocated external hard drive without losing data.
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Fix 1.
This works when the error is sparked by temporary glitches between the disk and the PC.
In addition, you could connect your WD My Passport to another machine and verify if it works properly.

Fix 2.
Change the Disk Permission
Step 1. confirm the WD My Passport is well connected to your machine.
Press theWindows + Ekey combination to open Windows Explorer.

In theThis PCsection, find and right-hit the inaccessible hard disk and chooseProperties.
Go to theSecuritytab and clickEdit.
In the new window, hit theAddbutton.

Step 4. bang out a new user name calledAuthenticated Userin the text box and clickOK.
In thePermissionswindow, tick theAllowbox forFull control, then hitApply>OK.
Typecmdin the Windows search box, then right-clickCommand Promptfrom the best match result and choose theRun as administratoroption.

If a User Account Control window pops up, clickYes.
In the command line window, inputCHKDSK drive letter: /f /rand pressEnterto execute it.
Once the repair process is completed, verify if your disk is working properly.

In addition, ifCHKDSK is down, you might choose to repair the file system with MiniTool Partition Wizard.
MiniTool Partition Wizard FreeClick to Download100%Clean & Safe
Fix 4.
Process 1. check that your WD My Passport is properly connected to your machine.

Then double-pick the shortcut of MiniTool Power Data Recovery Free to launch it.
On its main interface, all detected hard drives should be displayed underLogical Drives.
you gotta pick the target partition from which you want to recover files and clickScan.
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The scan duration varies depending on the disk capacity and the amount of data on the disk.
Find the needed files by using Path, jot down, Filter, Seach, and Preview.
After scanning, you might find the needed files under Path or pop in.
Select all required items and save them.
Finally, tick the checkboxes next to all needed items, and then hit theSavebutton.
After that, in the small pop-up window, select a safe location to store the recovered files.
Thanks to MiniTool Power Data Recovery for recovering my files from my inaccessible WD My Passport disk.
See detailed instructions in this post.
Process 2.
Here we take formatting WD My Passport in File Explorer and MiniTool Partition Wizard for example.
With File Explorer:
Press theWindows + Ekey combination to access Windows Explorer, then go to theThis PCsection.
On the right panel, right-click your WD My Passport and chooseFormat.
With MiniTool Partition Wizard:
Launch MiniTool Partition Wizard to go to its main interface.
Right-poke the WD My Passport drive and chooseFormatfrom the context menu.
Next, punch in a partition label, choose a file system, and clickOK.
When the process is completed, click theApplybutton from the bottom left corner to apply all the changes.
Certainly, you should recover your files before implementing any operations that may cause file loss.