USB external storage failure

[pdurys]

Hi There,

Since upgrade to 6.0.1, I am facing problem with External USB Disk connected either via OTG cable or directly into USB port.

I am receiving prompt that command '## volume partition disk:8,0 public' failed with '400 27 Command failed'

There is nothing wrong neither with OTG cable nor USB Disk itself as it is perfectly recognised by older Xperia M, PC, Ubunt.

I see in Terminal that android.permission MOUNT_FORMAT_FILESYSTEMS is missing for current user and current process

Anybody can suggest how to use external USB Disk with X Z3C under Marshmallow?

Thanks

[Rickard]

Could you take a log from your phone in case 3, 4 or 5 and send it to me?

To do this:
Settings > About phone > Build number, tap 7 times on the build number
Go back to Settings and select Developer options and turn on "USB debugging". Then tap "Logger buffer sizes" and set this to "4 M".
- Restart the phone (with one of the bigger SD cards inserted but not the OTG)

- Connect the drive using OTG
Settings > Developer options, select "Take bug report". When the report is ready (may take a minute or so) you get a notification that you can tap and share to Google Drive. Please send me a link to this file in a private message.

[bigboco]

Further investigated, 128gb exFat card on old USB 2.0 card reader actually works, but same card is not working on USB 3.0 card reader. This USB 3.0 card reader worked perfectly fine on Lollipop. Maybe new Google otg driver is the culprit. Poor driver compatibility.

[bigboco]

Found another issue. It's seems Marshmallow can't support otg drive and sd card simultaneously. If I mount otg drive, both sd card folder and otg drive will show content of otg drive. If I re-insert sd card, both folders show content of sd card. otg function is practically useless on marshmallow. I really hope sony flip back to old implimentation.

[bigboco]

I can't mount both sd card and otg drive if they are both exfat format. If I format sd to fat32, then otg drive works fine.

[Zevos]

I Have the Z3 compact i try to use Kingston MicroDuo Flash drive 32gb Usb 3.0 OTG and i cant copy paste from my usb to my phone,i cant copy paste from my phone to usb to This operation is not supported. why?

[PM-007]

Hi

How to you format SD card to FAT32?