How to format raw sandisk

Question

how to format raw sandisk 250 hard drive with window xp.i couldnot use this mp3 player after i used this device to transfer files from one computer to the other.after transferring the file,i deleted the file and connected to a computer through usb port.The sandisk 250 displayed the following massage"not enough space for music DB.Please free 4MB.".There was no way for me to achieve this because i did not know how.The properties of this device showed the following information:file system: rawused space: 0 bytesfree space :0 bytescapacity: 0 byteswhen i brought this sandisk 250,there was 2 gb capacity