Huawei MediaPad M3 not recognized

[Bent]

Huawei + Harman Kardon MediaPad M3 running Android 6.0 and EMUI 4.1
Calibre 2.83 [64bit]

The device, when plugged in, is recognized by explorer as a device, and can have files dragged and dropped onto.

Switching between USB connected modes does not help.

I have no ignored devices, and a plugin for Huawei devices is not in the device plugin list.

calibre 2.83 [64bit]  embedded-python: True is64bit: True
Windows-8-6.2.9200 Windows ('64bit', 'WindowsPE')
('Windows', '8', '6.2.9200')
Python 2.7.9
Windows: ('8', '6.2.9200', '', 'Multiprocessor Free')
Successfully initialized third party plugins: DeDRM (6, 5, 1)
USB devices on system:
(USBDevice(vendor_id=0x46d product_id=0xc332 bcd=0x302 devid=usb\vid_046d&pid_c332&rev_0302&mi_00 devinst=1),
 USBDevice(vendor_id=0x8087 product_id=0x7dc bcd=0x1 devid=usb\vid_8087&pid_07dc&rev_0001 devinst=2),
 USBDevice(vendor_id=0x46d product_id=0xc332 bcd=0x302 devid=usb\vid_046d&pid_c332&rev_0302&mi_01 devinst=3),
 USBDevice(vendor_id=None product_id=None bcd=None devid=usb\root_hub30&vid8086&pida12f&rev0031 devinst=4),
 USBDevice(vendor_id=0x12d1 product_id=0x107e bcd=0x299 devid=usb\vid_12d1&pid_107e&rev_0299 devinst=9),
 USBDevice(vendor_id=0xc45 product_id=0x133 bcd=0x101 devid=usb\vid_0c45&pid_0133&rev_0101 devinst=5),
 USBDevice(vendor_id=0x46d product_id=0xc332 bcd=0x302 devid=usb\vid_046d&pid_c332&rev_0302 devinst=6),
 USBDevice(vendor_id=0xc45 product_id=0x133 bcd=0x101 devid=usb\vid_0c45&pid_0133&rev_0101&mi_00 devinst=7),
 USBDevice(vendor_id=0x12d1 product_id=0x107e bcd=0x299 devid=usb\vid_12d1&pid_107e&rev_0299&mi_01 devinst=10),
 USBDevice(vendor_id=0x12d1 product_id=0x107e bcd=0x299 devid=usb\vid_12d1&pid_107e&rev_0299&mi_00 devinst=11),
 USBDevice(vendor_id=0xc45 product_id=0x133 bcd=0x101 devid=usb\vid_0c45&pid_0133&rev_0101&mi_01 devinst=8))

No disabled plugins
Looking for devices of type: MTP_DEVICE
List of WPD PNP ids:
[u'\\\\?\\usb#vid_12d1&pid_107e&mi_00#6&2eba913&0&0000#{6ac27878-a6fa-4155-ba85-f98f491d4f33}']
MTP device: \\?\usb#vid_12d1&pid_107e&mi_00#6&2eba913&0&0000#{6ac27878-a6fa-4155-ba85-f98f491d4f33}
{'device_version': u'1.0',
 'friendly_name': u'',
 'has_bulk_properties': True,
 'has_storage': True,
 'manufacturer_name': u'HUAWEI',
 'model_name': u'BTV-W09',
 'protocol': u'MTP: 1.00',
 'serial_number': u'28D6R16C28001971',
 'storage': [{'capacity': 26912718848L,
              'capacity_objects': 0L,
              'description': u'Internal storage',
              'filesystem': u'Generic hierarchical',
              'free_objects': 1073741824L,
              'free_space': 21123289088L,
              'id': u's10001',
              'name': u'Internal storage',
              'rw': True,
              'type': u'fixed_ram'}],
 'type': 'media player'}

Trying to open: \\?\usb#vid_12d1&pid_107e&mi_00#6&2eba913&0&0000#{6ac27878-a6fa-4155-ba85-f98f491d4f33}
Opened BTV-W09 successfully
Device info:
{'device_version': u'1.0',
 'friendly_name': u'',
 'has_bulk_properties': True,
 'has_storage': True,
 'manufacturer_name': u'HUAWEI',
 'model_name': u'BTV-W09',
 'protocol': u'MTP: 1.00',
 'serial_number': u'28D6R16C28001971',
 'storage': [{'capacity': 26912718848L,
              'capacity_objects': 0L,
              'description': u'Internal storage',
              'filesystem': u'Generic hierarchical',
              'free_objects': 1073741824L,
              'free_space': 21123289088L,
              'id': u's10001',
              'name': u'Internal storage',
              'rw': True,
              'type': u'fixed_ram'}],
 'type': 'media player'}

[kovidgoyal]

Accorind to this line in the log you posted:
Opened BTV-W09 successfully

there is a device named BTV-W09 being opened successfully. Is that your device?

[Bent]

Hi, sorry for the late reply.

Yes it is my device. I tried connecting it again after rooting my device and it connects successfully. Not sure why it worked this time, but I can move books into my m3 now.
Sorry for taking up your time.