merge song database

[billyo]

i was over a friends house trying to help her with her comp. problem, ( couldnt find any solution) but anyway, she's running out of space on her c: drive, so i copied most of her songs to an ext. drive when done copying, tried to rebuilt her song database and got a msg." hoster has encountered a problem" and so on..tried to do it again same msg, and also i was just gonna do a merge, but it's only showing " add and rebuild" i'm lost on these new versions...