Free Cloud storage provider with an API WITHOUT oauth?

Anybody knows a FREE (some free volme, 2-5 GB i mean - continuously, not just the first year like Amazon S3) cloud storage provider which has an API that does NOT use oauth ?

I need that to make regular backups to from a console service (scheduled web-browser and user-input free application).

I have looked at DropBox, Google Drive, SkyDrive and UbuntuOne.
DropBox & Google use oAuth, which I can't use (oAuth is NOT web-browser & user input free).
UbuntuOne's "API" is a horrible mess - simply unusable.
SkyDrive SDK needs Windows. I have my data on a Linux server, and that's not gonna change.