Host an FTP server so you can access your file system remotely
Download a FTP server and you'll be able to access your files anywhere through a FTP client or web browser (which, depending on the browser, may require a plug-in).
For a list of FTP servers see this link.
FTP servers can be a little tricky to setup at first because you'll need to set up the correct user privileges but they can be real handy to use a headless unit to use as a remote storage/backup point.
Note: From personal experience, be sure to make sure that IP addresses are automatically banned after a certain number of failed attempts. From checking my FTP logs I found out that numerous locations in China had been attempting to hack my FTP server on numerous occasions.
Back in the day, it was common for piracy organizations to hack public FTP servers to provide free space/bandwidth to share their files across the net. With the advent of torrents it's not as common these days but it still happens. Be sure to limit the security of your server to prevent this from happening if you share it publicly.