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Newbie
Posts: 4
Registered: ‎07-22-2016
Accepted Solution

usb flash drive not recognized

I have a sandisk cruzer 8gb flash drive, and 3 computers. the flash will work on 2 of the computers but not the 1 any ideas why. thank you

 

PS, the 1 computer will reconqize other usb devices

SanDisk Guru
Posts: 2,424
Registered: ‎07-23-2010

Re: usb flash drive not recognized

any ideas why

 

Oxidized USB 3.0 contacts in the USB port can cause this.  A brief clean up with emory paper should work.

Ed
Important files = Backed up files
Newbie
Posts: 4
Registered: ‎07-22-2016

Re: usb flash drive not recognized

I will try that, but the port on just the 1 computer does detect other usb devices just not the sandisk.

Newbie
Posts: 2
Registered: ‎08-10-2016

Re: usb flash drive not recognized

SOLUTION

  1. Open Run (Win+R)
  2. Type “compmgmt.msc” , click Ok
  3. In left side click Disk Management, the Disk management window will open.
  4. In right side at the bottom you will get this option “Universal Serial Bus Controllers”. Expand this by click on ‘+’ button.
  5. You will see all the list of USB controllers.. you will find a “Unknown Device”
  6. Right click on Unknown Device and click Uninstall.
  7. Restart your system. Now connect USB, window will automatically install the drivers.
Newbie
Posts: 4
Registered: ‎07-22-2016

Re: usb flash drive not recognized

Thank you for your reply. I do not have the option “Universal Serial Bus Controllers”. In the Disk management window.
Newbie
Posts: 1
Registered: ‎08-21-2016

Re: usb flash drive not recognized

I also have the similar problem after upgrading from Windows 7 to Windows 10. I tried different USB ports on my laptop and still no luck.

Newbie
Posts: 4
Registered: ‎07-22-2016

Re: usb flash drive not recognized

Sloved my problem by buying a new Front USB Audio I/O Input Output Control Panel Board Card. .
Newbie
Posts: 1
Registered: ‎12-02-2017

Re: usb flash drive not recognized

 

Mine was fine but no drive letter was assigned.  I just had to assign the letter in disk manangment and all worked again.