Well I screwed up the first time, as I can’t mount usb thumb drives, or any other usb device.
Update
That worked. Under file system > native language support. Make sure they’re all on to be safe, since I’m not sure which one it needed. I turned em all back on. You might only need to check the ISO xxxx ones. Though I don’t want to keep recompiling it so, I selected them all.
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