USB How to restore the play list CDJ2000

Good administrator
hello everyone
I am from China's DJJACKL
Recently accidentally deleted the list of USB songs

Rekordbox original file does not exist

MENU-ALL DELETE 

Careless operation causing loss of list
How to restore

I want to know where the USB list file is.
What's the name?

Please help me
Electronic mail

DJJACKL@QQ.COM