Because of memory shortage I rooted my phone and installed Link2sd; initially the free version, but needing more memory freed up, I recently upgraded to the Plus version. I followed the instructions about creating a partition on the card (though it isn't clear to me if that was necessary: the card already had a 2GB ext2 partition, but I made another 2GB ext4 partition anyway). After that, Link2sd connected all the data files to the card, but it gives an error every time I try to link .dex files (for both pre-installed and installed apps). How can I get the .dex files to link? I always get a message like: "rm failed for /firstname.lastname@example.org, I/O error" or "rm failed for /email@example.com, I/O error".