Well, I've been using MX Player to play movies from the OTG mounted sdcard, and it seems to work fine while I'm playing, but the problem I run into is that something must be started in the background that has something open on the sdcard, because I can't ever seem to unmount it so I can safely unplug it. I don't suppose there is an app out there anywhere than can kill things that have certain filesystems open is there?
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