Online file storage and backing up MB

Dropbox.com is primarily a free service that helps you to upload several formats of file.The usage of it is not restricted to windows and it works totally well on Ubunthu versions.It is applicable for usage with mobile also.

FilesAnywhere.com offers the best online file storage, with cloud storage solutions for Internet backup, file sharing, secure FTP hosting, and web folders .It has an option of free account as well as paid option.both the options has SSL security topup

Box.net let you store and share your content with confidence. 99.9% up-time guarantee, SSL encryption, redundant storage, configurable permissions, and more.Its a cloud based answer to your storage

yahoo briefcase is a typical option too

ADrive.com offers 50GB of free online storage and backup for all file types. Store your files with ADrive and access, manage and edit them from any computer .

Even mozy.com sounds good for backup .