Chrome Version: 67.0.3390.0
OS: Chrome OS
Platform: 10568.0.0
Device: eve

What steps will reproduce the problem?
(1) Connect a USB flash to the DUT.
(2) Open Android settings -> Storage -> Explore

What is the expected result?
USB flash is shown on the UI.

What happens instead?
USB flash is not shown.

Please use labels and text to provide additional information.

If this is a regression (i.e., worked before), please consider using the
bisect tool (https://www.chromium.org/developers/bisect-builds-py) to help
us identify the root cause and more rapidly triage the issue.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.