Corrupt USB Help

Hi, really need some help -  i was playing out and the CDJ Crashed - and now my USB drive when plugged into CDJs says 'NO USB'

i have tried making a copy of the key (on a PC) - and still the same problem 

have plugged into my laptop that runs RB 5 and it says its corrupt 

i have run disk utility on my mac and its says its repaired but still same corrupt box comes up when opening RB5 

i can see all the folders on my laptop - i don't really mind reformatting it - but i don't want to lose all my HISTORY files - is there a way of saving his data? and putting it back on to the key 

i have about 200 DJ - Gigs worth of history on there and i regularly use it and don't want to lose it -

PLEASE PLEASE HELP ME -