Disk Utility Can't format my USB drive

I've got a Transcend 8GB usb drive and i want to erase everything on it but i can't. I know that the best way to do this is the Disk Utility (Because Finder can't erase them too. When I drag and drop to the bin, it says "43 files cannot be deleted")
When i attempt to format, this message appears from disk utility:
What does this mean?
and also, another message appears at the same time.
What does this mean?
I just wanted to format my disk. But i can still see the content in the disk. But can't copy them to desktop.
Please help me!

Happens with corrupt drives may be due to partition table failure. may be a similar post can help you POSIX reports: The operation couldn’t be completed. Cannot allocate memory

Similar Messages

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    Version:1.0 StartHTML:0000000105 EndHTML:0000004136 StartFragment:0000001438 EndFragment:0000004100                    
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