Windows 10: USB Drive Letter Assignment not persistent

Discus and support USB Drive Letter Assignment not persistent in Windows 10 Drivers and Hardware to solve the problem; I have a removable USB HDD that I use for second-level backups. I plug it in to my system only for this purpose. Almost every time I plug it in, I have... Discussion in 'Windows 10 Drivers and Hardware' started by x509, Mar 16, 2018.

  1. X509
    x509 Win User

    USB Drive Letter Assignment not persistent


    I have a removable USB HDD that I use for second-level backups. I plug it in to my system only for this purpose. Almost every time I plug it in, I have to use Administrative Tools to re-assign a drive letter. Is there anything else I should be doing so that Windows keeps that drive letter persistent?

    :)
     
    x509, Mar 16, 2018
    #1
  2. ENGLISHMANINJAPAN
    EnglishmanInJapan Win User

    Windows 10 bug - USB Drive vs NAS drive mapping conflict

    Hello Hector,

    NAS Drivers were assigned drive letters using the Command prompt with the /persistent:YES flag.

    Internal SDD/HDD/CD/DVD were assigned drive letters using diskmgmt.msc.

    My question is not, how to assign drive letters, but, why Windows 10, assigns a currently assigned drive letter (although not connected) to a USB drive, which then can't be seen ?

    e.g. H: is assigned to \\HOME\MyUserId

    the HOME NAS server isn't online, so the H: drive icon is shown with a Red x, indicating that it's unable to connect to that drive.

    I now plug in a USB Drive. The drive is automatically given the drive letter H:, but because H: is already mapped to a NAS drive, the USB Drive isn't displayed until I delete the NAS drive mapping.

    Why can't Windows 10, select the next available free drive letter ?

    Are there any registry settings involved with the assignment of drive letters to external USB drives ?
     
    EnglishmanInJapan, Mar 16, 2018
    #2
  3. SEAHAWKS65
    seahawks65 Win User
    Swapping out the USB drive to use File History.

    well if you have an extra USB port available, Just leave it in and plug in new one and format quick NTFS and assign new drive letter if not already assigned and restart pc.

    If you do not have extra USB port, I would unplug it, restart PC, plug in new one, format it to quick NTFS and assign new drive letter, other than the previous USB drive letter if not already assigned, although it may just assign the same Letter, and restart
    pc and you are good to go.
     
    seahawks65, Mar 16, 2018
    #3
  4. EDTITTEL
    EdTittel Win User

    USB Drive Letter Assignment not persistent

    If you assign or change the drive letter and paths in Disk Management with the USB drive mounted, it should persist from mount to mount. Most experts recommend that you pick a "higher letter" M through V for that assignment (and don't pick the same letter for multiple drives to avoid collisions).
    HTH,
    --Ed--

    See this HowToGeek Article for more details on what to do and how to make this happen: How to Assign a Persistent Drive Letter to a USB Drive in Windows
     
    EdTittel, Mar 16, 2018
    #4
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USB Drive Letter Assignment not persistent

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