Smart phone backup

10 GB would be less than $50 per month in many services providers. Speeds are over 100k/sec. Do the first sync by popping the SD card into your laptop, install rsync, set up a scheduled task to run while the thing is on the charger at night and then forget about it.

If you are at home it can even discover and use WiFi saving you some bandwidth, if you think it's worth the hassle.

Of course you might have problems with this if your smart phone doesn't run Linux, but it'll only cost you about $300 to fix that.