Don't know if it was connected with an aborted download of seiyuu drama CD's in .rar format;but last night,the USB drive malfunctioned enough that I couldn't safely remove it while the comp was still on.Only after my sister shut it down(after doing some stuff)was the card reader removable.Fortunately,the Memory Stick Duo that had all of my Kappei MP3's was still intact with no lost files...