I'm sorry if I'm intruding too much in this thread. I quickly read through the article. However I don't get any red "i" icon, it's just incredibly slow. So I'm not sure which actions to try. I tried deleting the NetworkInterfaces file, but that didn't work.
The speed of the Time Machine backup seems to be fluctuating a whole lot. It's at 1.4 GB out of 21 GB. Sometimes it chugs on about 10 MB/s, which seems to be the max of the SD card. Sometimes it's just stuck.
I'm considering trying another app called SuperDuper if this isn't finished by tomorrow. I'm going to let PowerNap continue on the quest of taking a backup through the night.
By the course of this message, it's actually at 1.7 GB out of 21 GB, so maybe somethings working now. I was just relly thrown off that the 8 hours this night wasn't enough. I'll update later.