I have MP3+USB+FM Pen drive of 512MB capcity. While copying the data from computer to pendrive, the process stopped due to insufficent space in pendrive. But some files of 253 mb was created, for which I'm unable to delete it. So I formated the pendrive thru MY Computer- Format Dialog box. However now, my pendrive capcity is showing only 243 mb. Pls suggest me how to regain the lost space!!!!!