When an Android smartphone/tablet and the CDJ-2000nexus are connected by USB cable, the smartphone/tablet is not recognized by the CDJ-2000nexus.

This may be due to one of the following reasons:

1. The Android smartphone/tablet you are using does not support the MTP mode. The smartphone/tablet must support the MTP mode in order to connect it by USB cable to the CDJ-2000nexus. For information on whether or not your smartphone/tablet supports the MTP mode and how to set it, see the operating instructions of the smartphone/tablet.
2. Depending on the specifications of the MTP mode of the smartphone/tablet you are using, the operation may differ depending on whether or not an SD memory card is inserted. In some cases, it may be possible to connect the smartphone/tablet to the CDJ-2000nexus after removing (or inserting) the SD memory card.
3. Depending on the specifications of the MTP mode of the smartphone/tablet you are using, there are some terminals on which the “MTP in use” message is displayed continuously in the foreground of the screen of the smartphone/tablet while connected by MTP. With such terminals, rekordbox cannot be operated with MTP connections, so such terminals cannot be connected to the CDJ-2000nexus using a USB cable.
4. Depending on the specifications of the MTP mode of the smartphone/tablet you are using, MTP connections may only be usable with applications exclusively for Macintosh or Windows. Such terminals cannot be connected to the CDJ-2000nexus using a USB cable.