Problems mounting USB drive via USB OTG port

Hello to all. I have a Wandboard Quad running Arch Linux ARM v. 5.8.7-1-ARCH. it serves as a mini-NAS and has one USB A port and one USB Mini AB OTG port. I have a Seagate Backup Plus USB hard drive connected to the USB A port and it works flawlessly.

I would like to connect a second USB drive to the USB OTG port and mount it at boot time. I have tried commenting out the USB drive in fstab and then rebooting and plugging in the same drive to the USB OTG port via a USB A female-to-USB Mini B cable. But the drive seems to be detected as a USB hub, or is not detected at all:

Code:[alarm@alarm ~]$ [ 3029.018790] ci_hdrc ci_hdrc.0: EHCI Host Controller
[ 3029.023760] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 2
[ 3029.050691] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[ 3029.056308] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.08
[ 3029.064613] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 3029.071870] usb usb2: Product: EHCI Host Controller
[ 3029.076778] usb usb2: Manufacturer: Linux 5.8.7-1-ARCH ehci_hcd
[ 3029.082725] usb usb2: SerialNumber: ci_hdrc.0
[ 3029.087729] hub 2-0:1.0: USB hub found
[ 3029.091659] hub 2-0:1.0: 1 port detectedlsusb -t shows only:

Code:/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ci_hdrc/1p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ci_hdrc/1p, 480MWhat can I do so that the USB HDD is detected as a storage device at boot time and mounted? The g_mass_storage module is in my device tree but I don't know how to get it to load at boot time and recognize the drive.

Any help would be appreciated.

Regards,
Les