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Solved: Windows Will Not Assign Drive Letter To USB Flash Drive

Problem Issue:

This is happening on Win8 and Windows 10.
When I remove a USB drive and reconnect it, Windows will not assign a drive letter. Clearly this is a problem as every other computer I use assigns a drive letter.

There are three solutions. All of which will work.

      1) You can go into Disk Management and select the device and assing a drive letter. This is a manual process and not ideal for each time you plug in a flash drive.
      2) Good chance the driver or registry entry for that device is rogue or corrupt. Use this USBScrub tool to remove the registry entry. Chances are this will fix the problem. USBScrub link
      3) Use ‘diskpart’ and enable the automount feature.
  • Open Command Prompt as Administrator (search for Command Prompt in the Start Menu, right click, Run as Administrator)
  • Type ‘diskpart’ and hit Enter.
  • Once in the ‘diskpart’ command prompt type ‘automount enable’ and hit Enter.
  • Type ‘exit’ and click Enter

For solution number one from above, Disk Management is really the GUI version for diskpart, but a GUI (Graphical User Interface) which has scaled down functions from what all the things diskpart can really do.

Diskpart has 37 commands that you can do very cool things with. The 38th command is

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Microsoft Finally Capitulated the USB Safe Removal

In a battle that is so ancient most no longer consider it an issue, Microsoft has gone away with the safe removal for USB flash drives. The original suggestion by Microsoft was to eliminate data lose if a user removed the drive before properly ejecting it.

Nine out of ten times you wouldn’t lose data, unless a large file was being transferred, but it’s nice to see Microsoft adjust to user habits.

The update which includes this change is Windows 10 v v1809. If you are not sure the Windows version you have, simply right click the Windows icon in the bottom left of your screen and select “System

From the resultant page, you can view the version of your OS.

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How To: Delete and Keep “System Volume Information” Folder Off Flash Drives

If you have found this post, chances are you are trying to delete and keep the “System Volume Information” folder off your flash drive.

I will venture to say, there are probably five reasons why you are trying to remove this directory (probably more):

  • You have a SmartTV or stereo in your car and the device is showing this folder, and often times, is the default start location to resume play, so you want to remove it.
  • A binary verification utility is failing and it shows this folder as the source of inconsistency.
  • The “Disk needs to be scanned and repaired message” keeps popping up when you remove a drive without using the Eject function from Windows.  You are now going crazy and want to stop that message forever.
  • A virus software utility is indicating this folder has a potential problem  (smart hackers could stick their code in here)
  • You are performing some kind of USB duplication process and this folder continues to be a problem, therefore you want to remove it.

Go ahead and skim down this article if you want to get right to the instructions.  For now, I’m going to take some time to explain what this folder is.  Knowledge is power, and maybe the reason for why it’s there, will deter you from wanting to delete it.

For any disk or storage device connected to Windows will have the “System Volume Information” folder.  This is a hidden system file, so if you don’t see it, that is the reason why.  You can see this file when you turn on “See Hidden Files” in your view properties settings.

The System Volume Information folder contains two files.  The two files are meant for setting restore points and indexing for what is on the drive.  Windows is trying to help you if and when you need to search the device for data.

The two files are the IndexerVolumeGuid and WPSettings.dat file.  The indexer file assigns a unique identifier (GUID, Global Unique ID) to the drive.  The indexing service examines the files so when you connect the drive to the computer in the future, Windows checks the identifier and knows which search database to associate with the drive.

WPSettings.dat file is used for Windows Phone’s Storage settings.  If you are dealing with a hard drive, this could be a good thing, if dealing with a flash drive, you don’t need it.  I haven’t met a person yet who backed up their phone data to a USB stick.

If you are still on the fence about whether you should remove this folder or not, think about this:  If you are dealing with a hard drive with an operating system, don’t delete it.  If you are dealing with mass storage drives, like a USB flash drive, you can remove it with little fear something bad will happen.

So how do you remove this folder?

How do you keep from this folder coming back?

The solution is a two-step process.  The first step will be disabling the indexing and thus, ask Windows not to put the folder on the drive.

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Harmonization Code for USB Flash Drives

HS Code for USB Flash Drives

When importing or exporting USB flash drives in the United States you will want to use this Harmonization Code to help with customs paperwork.

The Harmonization Code is tariff nomenclature for internationally trade which defines names and numbers assigned to traded products. The HS Code System came into effect in 1988 and has since been developed and maintained by the World Customs Organization (WCO), based in Brussels, Belgium. There are over 200 countries which participate in this program.

The HS Code for a USB flash drive is: 8523.51.0000

In the event your freight forwarder or delivery service tells you that an ECCN is needed to ship USB flash drives and is required to complete the Automated Export System (AES) or other documentation then please give them the above information and it should all work out.

ECCN stands for Export Control Classification Number. An ECCN is an alpha-numeric classification used in the Commerce Control List to identify items for export control purposes.

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How To: Partition a USB Flash Drive in Windows

Using Windows 10, you can partition a USB flash drive into multiple partitions. The process is not difficult, you simply follow some easy steps. This tutorial will partition the drive so that your device is assigned multiple drive letters when connected to the computer.

This partition process is not done at the USB controller level; or said another way, done at the hardware level. This USB partition process, for a lack of better terms, is done at the software level. What does this mean for you? It means the partitions can be wiped off the drive and full capacity of the USB flash drive can be restored.

When a USB stick is partitioned at the controller level, or at the hardware level, there is no way to reverse the partition. The multi-partition drive is permanent. At the end of this tutorial is the solution for a hardware based partition solution.

So let’s get started.

How to partition a USB flash drive in Windows 10:

Connect the USB flash drive to your Windows 10 machine. Be sure there is nothing valuable on the USB as this process will remove all content from the drive.

Right Click the Windows icon and select Disk Management.

The Disk Management window will appear with all the connected devices. Select your USB flash drive by clicking one time. By selecting your flash drive, it will allow Windows to apply the partition to that device.

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How To: Correctly Format a USB Flash Drive in exFAT

Whether you’re formatting an internal drive, external drive, or USB flash drive, Windows makes it possible to choose between NTFS and exFAT formats. In this guide, we’ll go over the simple steps to formatting a USB drive and which format is best for certain situations.

USB Format



exFAT is a file system optimized specifically for flash drives. Introduced in 2006, it’s designed to be a lightweight file system like FAT32 without the extra features of NTFS and without the FAT32 limitations. exFAT has very large file size and partition size limits so files larger than 4GB a piece can be stored on a flash drive formatted with exFAT. It makes very few unnecessary writes, and stores files throughout the drive in order to maximize the lifespan and speed up transfers.

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