What more info would you like? I've tried this now with some more devices. I have a very old 4GB SanDisk Cruzer, and I have two microSD card readers with two different cards, a 2GB and a 4GB, as well as the original Kingston drive. All of the drives show the "Unmount Error The device could not be unmounted because is busy" problem. All of them can be read fine in the computer.
The primary problem here is: as far as I can tell, only USB drives formatted on the phone itself can be read. Can you confirm? I wouldn't be surprised if there are power issues going on too, particularly with the Seagate Wireless (which doesn't even show up in External Drives). External Drives really should be monitoring for any USB power problems and reporting them to the user. I just noticed new behaviour, or perhaps I didn't see it before. I formatted the Kingston again, then copied videos onto it on the computer. Insert it and the new videos are visible in the Videos scope as before. But I also see a drive visible in File Manager too. That didn't happen before. The drive appears to be called "4C1B-155C". File Manager says there are "No files" there. Then I try to unmount the drive in External Drives. It says "Unmounting" but it hangs and I have no choice but to just unplug the drive. External Drives still says Unmounting, so I quit the app. There most definitely are files on the drive, so "No files" is a bug. Do I file that bug against File Manager? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1520441 Title: USB OTG finicky and opaque To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1520441/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
