Ah I see, you didn't mention that before! Dlna is only designed to work on a LAN, not over the internet. For remote access to your files (both up and downloading), the bionic comes with an app called zumocast that, from what I've read, works fairly well. You'll need to install the zumocast program on your home computer, too.
For mine, I just turned my computer into an FTP server and tied it to a domain name I got for free, so I can get on any computer in the world and type in my website name to get access to upload or download anything to/from my home computer.
However, for merely backing up pictures and videos, I recommend Google Plus. It automatically uploads any pictures and videos you take to your password-protected G+ account, which will then be accessable from any computer. If you later want to have copies of the pics on your home computer as well, you can just download them from G+.
Hope I helped!
P.S. wouldn't you be unable to move the pictures from email to your home computer until you got home anyway? In which case you'd be in prime USB distance! Plus a USB transfer is quicker than sending/downloading from an email and doesn't use any 4g!
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