In the floppy drive bay I have installed an DeLOCK 3.5" USB 3.0 Card Reader 4 Slot USB 3.1 Gen 1 cardreader and USB box. It has the longer blue connector. This is connected via an adapter to the onboard USB 3.1 Gen 2 connector (short connector on the side of the motherboard). The drive is attached to a 4 pin power cable (white) too.
The drive has energy (green lamp) and can read micro-sd and sd-cards. When attaching to the USB, it can only charge devices, but no USB connection happens.
Any ideas: Is there a max for USB for a PC, I have really many? Will it be more a problem of adapter cable or the drive has to be send back?