I'm so sorry!! I forgot about that "partial" subdirectory. You have to make that one too. So the first line of my example should read: Code: mkdir -p /media/mmc1/debian-apt-archives/partial I've fixed the original instructions, too. Thanks for catching that.
mkdir -p /media/mmc1/debian-apt-archives/partial
#apt-get upgrade E: Unable to write to /var/cache/apt E: The package lists or status file could not be found or opened.
#apt-get update E: Archive directory /var/cache/apt/archives/partial is missing