I'm going to travel around China for 3 weeks and I'm thinking how to backup my photo to the cloud (any storage provider is ok) taken with my old Canon 500D. Since I love to take time lapse, I will take several GBs of RAW file per day.
I don't want to bring my laptop with me, I don't have a tablet and I would like not to make my Android smartphone as bridge between the WiFi SD card and the cloud (by "bridge" I mean that I find inefficient that a picture is transfered from the SD card to the smartphone and from the smartphone to the cloud), but only as "controller" if necessary between the WiFi SD card and the cloud.
A perfect solution would be to control the WiFi SD card through the smartphone and say "upload everything stored to the cloud" (not passing through me, and not selecting each photo one by one). Since the big amount of data, this process will be done on a Wi-Fi network (otherwise I will run out data in few days) during night while I sleep (since it will takes several hours to upload the pic to the cloud).
Do you know any device/strategy to do what I described above?
I've read this answer which propose Eye-Fi, is it a valid solution for this problem? I never had one of these cards.