Kaos has recently posted about the new cool ability of Titanium backup to save backup files to a cloud server such as Dropbox. Read here: http://forum.ppcgeeks.com/android-apps-games/145969-drop-box-titanium-backup-titanium-media-server-love.html
You need Titanium Backup,
Titanium Media Sync,
and a cloud network such as Dropbox
Now the Media Sync costs a few dollars, but other than that your good to go with only a little downloading and setup. Titanium is free (the basic version) and all apps are found in the market. Dropbox is also free, you get 2GB free but can get more by using a referral (the person who referred you gets an additional 500MG as well, so do Kaos a solid and go back to the post and use his referral (and leave a thanks as well). Oh yeah….you need to be rooted as well!!
All you need to do is install all of these on your Android device, setup storage to the cloud network in the settings and your good to go….no full or lost memory cards, files available at any computer or dropbox-enabled device and a lot less headaches!!!