ERROR: unable to assign a drive letter

[Almaar72]

Checklist

• I looked at https://github.com/pbatard/rufus/wiki/FAQ to see if my question has already been answered.
• I performed a search in the issue tracker for similar issues using keywords relevant to my problem, such as the error message I got from the log.
• I clicked the 'Log' button or pressed Ctrl-L in Rufus, and copy/pasted the log into the line that says <FULL LOG> below.
• The log I am copying is the FULL log, starting with the line Rufus version: x.y.z - I have NOT removed any part of it.

Additionally (if applicable):

• I ran a bad blocks check, by clicking Show advanced format options then Check device for bad blocks, and confirmed that my USB is not defective.
• I also tried one or more of the following:
  • Using a different USB drive.
  • Plugging the USB into a different port.
  • Running Rufus on a different computer.
• If using an image, I clicked on the (✓) button to compute the MD5, SHA1 and SHA256 checksums, which are therefore present in the log I copied. I confirmed, by performing an internet search, that these values match the ones from the official image.

Issue description

Attached you can find a screenshot. You can see the ERROR message.

Log

Rufus x86 v3.21.1949
Windows version: Windows 10 Home, 64-bit (Build 19044.2364)
Syslinux versions: 4.07/2013-07-25, 6.04/pre1
Grub versions: 0.4.6a, 2.06
System locale ID: 0x0C0A (es-ES)
Detected installed Windows Language Pack for 0x0409 (English (English))
SetLGP: Successfully set NoDriveTypeAutorun policy to 0x0000009E
Localization set to 'en-US'
Notice: The ISO download feature has been deactivated because 'Check for updates' is disabled in your settings.
Found USB 2.0 device 'Generic Flash Disk USB Device' (058F:6387)
1 device found
Disk type: Removable, Disk size: 16 GB, Sector size: 512 bytes
Cylinders: 1950, Tracks per cylinder: 255, Sectors per track: 63
Partition type: MBR, NB Partitions: 1
Disk ID: 0x7A18C285
Drive has an unknown Master Boot Record
Partition 1:
  Type: NTFS (0x07)
  Detected File System: NTFS
  Size: 14.9 GB (16041979904 bytes)
  Start Sector: 2408, Boot: No

[pbatard]

That log is not a full log, so I can't really help you because you've just not provided enough data.

I would suggest to try Alt-Z to zero your drive and try again, but, if you want to re-open this issue and actually get help, please provide the full log from Rufus of what happens when you try to create the media, and not just a log from opening Rufus after you created the media and closed Rufus.

[mokmonster]

Easiest answer - make sure your USB drive is empty

[github-actions]

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