Explorer doesn't list Sandisk 16GB cruzer switch pen drive

I have purchased Sandisk 16GB cruzer switch memory drive.

When I plugged it into USB drive, I found that explorer doesn’t list it and hence I am unable to use it. But it shows it in Computer Management -> Storage -> Disk Management. But again, if try to assign it a drive letter or try to format it, it shows errors.

Any idea why this is happening?

Thanks