ROCK file import to internal HD

I am running internal HD to store my music mainly because I dont like external storage hanging on my NUC, and of course it is faster, my music collection is only about 1.2TB.

Going to ROCK created some problems, because it appears I need another computer connected to network to import music files to internal storage!

Is there any way to for example, importing music straight from external USB to internal storage of ROCK installed NUC, without having to use another computer??

Thank you so much!