That probably means you're using MTP. Does the path start with mtp:// when viewing the device?
Using FTP is usually a much more reliable way to access mobile devices, at least if you're running Android. The MTP stack in Windows is not very reliable.
That should work, and not crash, unless a file on the card is triggering a bug in something (which may be in a third party shell extension rather than Opus).
Crash dumps are needed to diagnose what's going wrong there.
If it matters whether a hub is used then there may be an issue with the USB drivers on your system, or power to the hub being used (although I'd be surprised if low power causes a crash rather than an error).