Your flash memory not work than you must the format your system.

I had the same problem for weeks and I couldn't figure out why it would work on my personal laptop but not my work PC.

My problem was that the Flash drive was using "H:" as the drive letter and I already had "H:" assigned to a network share. The computer obviously recognized it because it appeared in the Disk Management, but it was assigned to H: and the PC already had "H:" connected to my share. I could have just changed the drive assignment for the flash drive to another letter and restart the PC as previously mentioned but I was in the middle of working on something and restarting my PC wasn't the best thing to do at the time. I decided to try to disconnect my "H:" network share and reconnect it using a different drive letter ("J:" in my case). After doing that I reconnected the flash drive and it opened fine under "H:"

Just another option to look into.

*sob*

I think I've gone and done it now.

So, I tried again today and the drive showed up and stayed up! I was very excited. Except that only the U3 drive was accessible. It wouldn't let me get to the data drive of the cruzer. It said that something happened in the U3 startup that made it so I couldn't access that. I forget the exact details, but, brainiac that I am, I figured, ok, if I get rid of the U3 aspect of the thing, I'll just have my data left. So I accessed the LaunchPadRemove app and removed the U3-ness. It asked me if I wanted to save the data that was on the disk and reinstall it after the format, so I clicked yes of course.

As it did this, I realized one really bad thing. The main file I wanted was my bookmarks file from Firefox from the U3. It hit me that I might've totally killed that by removing the U3. Also, when it was done and said "ok, now it's a storage only drive" the drive was empty! Ok, I can see it now, but it's empty! I have a recovery place that says they may be able to get the stuff off of it, but if they do, it's $75, which I don't have. :(

I've used a couple recovery programs I found and they found odd and end files, but nothing readable.

Anyone?

Thanks!

Same problem on vista 4gb flash drive if vista needa wait a while

Try sticking the USB up your ass then put it in your mouth for a thorough wash then it should work

I've read all the answers to this ( Sounds like a load of Guess work to me). Here is how to fix this problem quickly and easily.

I have a EMTec 32Gb flash drive, which every time I plug it in window's doesn't recognise it. The fix is very easy and it works every time.

Go the the computers Device Manager from within the 'Computer Managment' screen.
At the bottom of the list of devices is 'Universal Seial Bus Controller'.

Exand this window. You will notice that there is an unrecognised device in there. This is the key that you just installed.

Directly above this you will see a 'USB2 Enhanced Host Controller'. Highlight this and right click on the mouse.

Select the 'Unistall' option on this device.

At the top of this window there is little monitor icon with a magnifying glass, click on this. The computer will then scan itself and reload any devices and hardware it finds. It will also load the flash drive so that you can access it.