Got a 512mb usb drive and it used to have some files on it. Unfortunately today when I connect it to my pc, the files went missing. On the properties tab, it shows that it has used up 23mb out of 512mb but no files can be found. Without getting any further, I went to reformat it without realizing that it was formating 481mb off the usb drive, which means the rest of the storage space (23mb) is missing. My point is this, is there a way to recover the storage space so that it returns to 512mb?