I'm having problems accessing a usb card that I've been trying to write
to. In Caja I get an error saying "An operation is already pending"
If I type sync on the command line it hangs.
I see from ps that there are three sync processes in uninterruptible
sleep and I can't kill them. I assume this is the problem.
What's the best way to proceed? I'm using Ubuntu Mate 18.04 with