XDJ RX Questions Important for me

greetings, I buy a rx XDJ but I have a big question about something I do not understand is what is the limit of songs that supports the XDJ rx for example if I have a memory (pendrive) with 20,000K songs that means the XDJ 20,000K not recognize these songs bone that only the computer supports music 10,000K in total, if so I count around 60,000K different musical genres from which to sincerity are very essential for me, I await your response as this question is the one that has me waiting to decide on the XDJ or SX2 Sorry DDJ am using the English translato