First things first, what is cloud storage?
According to Wikipedia, Cloud Storage is a model of networked online storage where data is stored on multiple virtual servers, so that you can save your data in different servers and then get access to it from the one nearest to you, wherever you are.
The following are 10 best services that offer free cloud storage for you to back up and sync your files of your computers and/or mobile phones.
Dropbox will offer you 2 GB free storage, and you can get 250 MB (up to 8 GB) by inviting every one new user.
Dropbox supports Windows, Mac and Linux computer operation systems, as well as iPhone, iPad, Android and BlackBerry.
SugarSync offers 5 GB free cloud storage, and if your friend uses your referral link to sign up, you’ll earn a 500 MB bonus, up to 5 GB.
SugarSync supports Windows and Mac computers, as well as iOS, BlackBerry, Android, Windows Mobile and Symbian mobile phones.
ZumoDrive offers 2 GB free storage, supports multiple languages, and works for Windows, Mac and Linux computers, as well as iPhone, Android, and Palm Pre mobile phones.
With English and German support, TeamDrive offers 2 GB free space, and you can get 250 MB more by inviting every one user, the total free storage can be up to 8 GB.
This service is workable for Windows, Mac and Linux.
5. Ubuntu One
Workable for WIndows and Ubuntu, Ubuntu One supports multiple languages and offers 2 GB of free storage capacity for the Basic version.
IDrive offers 5 GB storage, supports multiple languages, and works for Mac, Windows and iPhone.
With OpenDrive, you can get 5 GB free cloud storage, and select your language.
But OpenDrive supports Windows only.
The free plan of Syncplicitywill offer you 2 GB storage, and for each friend who accepts your invite, you will get 1 GB, for up to 3GB extra.
Syncplicity is workable for Mac and Windows.
The SpiderOak service offers 2 GB free storage, which you can get access to from your Windows, Mac, Linux, Android and iPhone/iPad.
Windows Live Mesh of the SkyDrive service offers 5 GB free cloud storage for you to back up and sync your computer files.
Windows Live Mesh is available for multiple languages, but only workable for Windows.
Among the about top 10 free cloud storage services, whichever you use, you need to install its software in your computer or mobile phone to sync and back up your files automatically or manually, and then you can get access to your backup files wherever you are.
By the way, if you are worried about the security, you can sync and back up your files to more than one cloud storage.