Asking format now - SanDisk Cruzer Micro 8GB USB 2.0 Flash Drive

It sounds like your media is malfunctioning (controller issue).
If you format the drive, the data will be wiped. If you need to recover the data first, it is possible.
Our company, LC Technology, is the only Sandisk-approved
data recovery company and we have been working on their products
for over 5 years. You simply have to send your media to us.
Our technicians will recover your files on CDs and return everything
within 48h. You just need to send us your Sandisk with this form:
http://www.lc-tech.com/documents/LC_Technology_Data_Recovery_Service-SD-Eric.pdf

There is a charge for this service, but ONLY if we
are successful. The pricing is on the form. Please note
that the chances of recovery are around 90%.

Eric Beaudoin
[email protected]
1-866-603-2195 ext 103
LC Technology International

OPEN MY COMPUTER,THEN RIGHT CLICK YOUR DEVICE
CLICK FORMAT>CONFIRM DIALOG CLICK OK,,,THEN CHECK QUICK FORMAT
YOU CAN ALSO FORMAT THROUGH CMD PROMT,HERE'S THE STEPS:
A. Opening a Command Prompt :
1. Click Start 2. Then click All Programs 3. Point to Accessories 4. And click Command Prompt
OR
1. Open RUN ways of opening it:
Hold the Windows (it is in between the left CTRL and ALT ) picture on your keyboard then press R Type cmd Press OK Click Start then RUN Type cmd Press OK Command Prompt in its default location B. Type the location of the USB
It is commonly D:, E:,G:, or H:, depend on the number of disk inserted C. Press Enter on your keyboard
It will go to the location typed. D. Type Format location of the USB: then press Enter on your keyboard It should look like this E. Then the format process will begin . I didn't press enter thought my USB have has no problem with it ;D
F. The command prompt will say that the format is done. And that's it! You're done! Congratulations!
Hope that helps :)

This happens from time to time, when the software becomes corrupted that handles the drive.

Be advised that if you format it, you will for sure lose your data.

It is recommended to take this device to a professional pc technician or retail store to get assistance.

Last ditch effort at home is to restart your pc, and see if it was a one time glitch.