I was wondering why my lion OSx wont read some of my usb, i try today i put my usb but the Lion OSx wont detect it, again i put another usb both of them already attach on my imac lion osx but only one was detected, so when i pull out my usb that was not detected it display the dialog box says "you havent properly ejected the disk" but imagine this usb was detected on my snow loepard OS but when it comes so Lion OSX cannot be read, any comment on this?