Distro for old storage computer?

[Giganthrax]

I want to make an off-site storage computer to backup important files.

 

This machine would be offline/shut down most of the time, and I'd only really turn it on when I needed to manually update the backed-up files and/or add new ones. I would be assembling it out of some really old computer parts. We're talking 10+ years old motherboard and processor. No more than 1GB of DDR1 RAM, if that. 

 

I need a super light Linux distro that would run reasonably well on such a machine. It has to have a graphical interface and be easy to use for a Linux noob like me. 

 

My current favorite is Lubuntu. 

 

I also tried Puppy and Bodhi, but I hated those. 

 

Any other, lesser-known ancient computer-friendly distro I should check out? I can test them all in virtual machine, I just need to be pointed in the right direction.  

[Sauron]

For a server I'd go with Debian, the base install is very light and it's one of the most stable distros around. You can pick a desktop environment during installation, I'd go with xfce or lxde. No need to go for an "ancient" release, just download the stable release.