How much ram do i need for a files storage server?

Hello:

I am planning to rent a low end boxes with low memory (512 MB) and large Hard disk space (250 GB).

These Box will just store files and act as a multi servers balance for my videos and mp3 files.

There will be no mysql server or mail server, i will just install gwan server (According to statistics gwan consume low memory and act very fast on static file more than nginx).

My question is:

Does 512 MB ram server can handle my requirement very well?

I am looking for your suggestion.

Thanks.