Can files be uploaded to the SnapServer from remote locations like a regular FTP site?
This information is not Operating System specific
Yes, you can upload to the SnapServer by using FTP. Just make sure that you have SnapOS version 3.0 or higher. For GuardianOS you will need version 2.6 or higher.
SnapOS has been discontinued and is no longer offered for download. For GuardianOS powered Snap servers, please contact http://www.overlandstorage.com/support/contact.htm to find out how you can upgrade to the current version.