I can not add songs!
Please see this thread and try and make the subject a little more descriptive next time specifically including the error message - I assumed you tried to search the forum, your answer is below.
It looks like you don’t have the Beta version BB manager that lifts the 500 event limit. Without it, you won’t be able to load any ONE PRESS SONGS or song parts over 500 events. Contact Beat Buddy support and they will send it to you. Make sure you have the firmware update too.