ntoskrnl.exe !SeAccessCheckWith Hint+0x1c620 drive still in use error
Task Scheduler:
\Microsoft\Windows\MemoryDiagnostic\RunFullMemoryDiagnostic and \Microsoft\Windows\Defrag
run from background tasks Security and Maintenance - Automatic Maintenance
causes ntoskrnl.exe!SeAccessCheckWithHint+0x1c620
Try to disable defrag on this flash drive.
In my laptop i turned off the RunFullMemoryDiagnostic task because they were using 20% cpu when idle.