Hi, It is not the size. If the format is corrupted in any file in the pendrive you will be shown as RAW format.
So, what is wrong if you check for errors option. It has done good for me when the same thing happened to me.
Otherwise, i do not think any other help would mess up the things. Ease recovery are programs for different purpose.
That is what i think so,
Did you try, the check errors . I had a 8gb pendrive, having so much video audio application. Sudden powercut, though having ups, closed the computer abruptly. The error could not be located in the whole pendrive.
i was also alerted , that i must do the error checking. After checking, a success message popped up and my files are restored.