Dropbox, Gigabank & Crashplan
Compared to Humyo and Adrive, Dropbox drops the storage space to 2 Gigabytes. The upside of this service is that its software has a very small footprint and available for Windows, Linux, and Mac. The software works with Nautilus in Linux so do not forget to install this file manager before installing dropbox. After the installation you will see a Dropbox folder. Whatever file you put inside this folder is uploaded to your web space. I have this installed on my computer to backup everything other than my multimedia files and so far I am very satisfied. Plus, Dropbox has file versioning. Suppose that you have made 10 changes to a document and want to go back to the 6th change. You can easily go back with a single click on the website.
Gigabank is a real 'giga'bank, but I wish they were 'gigas'bank. The service only offers 1 Gigabyte of storage space for free users. Plus the software only runs on Windows XP and Vista. Mac and Linux users are out of the question. However, when you upgrade your storage to premium, Gigabank keeps your files for five years. If you look at the pricing, they ask for EUR 59.90 for 10 Gigabyte, which means EUR 1 per month. It is not a bad deal as long as Gigabyte is on the market for the coming 5 years.
Crashplan is another online backup site. The service is advertised very well and seems too good to be true: unlimited space, Windows, Mac and Linux compatible software, multiple offsite servers even for free users. The other side of the coin is that free users can not have real time backups in contrast to other services. The backup takes place daily. Crashplan is free for personal use and the plans are available for business users.
The verdict: My personal favorite is Humyo. I would recommend it definitely, but the only drawback, which is valid for all providers, is the long-term viability of the company. If they can survive, contrary to the companies that went down after the dot com bubble, they will probably take the first place.