Speicherkarte voll bei Eye-Fi X2 Karte / Eye-Fi card memory full

I had this problem and Eye-Fi support was not able to help, but now I've found the cause of the problem. Some month ago I've started to save photos as JPG AND RAW (not only JPG) on my Nikon D5100. I guess that's why the Eye-Fi software was not copying / deleting the RAW files and the SD card filled up.

Hope it works for you as well!