Official comment
First, there are a couple of different ways of using the XDJ-700 with rekordbox...
1) XDJ-700 as a stand-alone product
This allows you to use rekordbox as a music management software, where you then export music to a USB device for playback in the XDJ. This is using the USB mode on the XDJ.
2) XDJ-700 linked to rekordbox (EXPORT MODE)
If you use the ProDJ Link (ethernet) to connect your players together with your computer, you are able to use rekordbox (in export mode) as a source for your music, rather than needing to export to a USB drive. For this, you would use the rekordbox button on the XDJ.
3) XDJ-700 in HID mode to control rekordbox (PERFORMANCE MODE)
For this, you'll need a rekordbox dj license to connect the XDJ-700 to your computer via USB to use it as a controller in order to perform within the rekordbox software itself.
To answer your question of being able to access different browsing and sorting options on the USB drive, you need to enable them. With the USB drive connected...
1) Click on the drive name.
2) Click the Category tab.
3) Select the categories you wish to enable.
4) Click the -> arrow to add them to the active list.
Repeat for the Sort tab as well.
You can order them as you like with the Up and Down buttons.
