There a re a number of FREE services which offers Cloud backup / Sync solution for a normal desktop users.

1. ## [DropBox
](http://www.dropbox.com)

Dropox is very famous now a days. The free account gives 2 GB space and there are client application for easy file uploading and syncing.
Supported Platforms : [Windows](https://www.dropbox.com/downloading?os=win), [Mac](https://www.dropbox.com/downloading?os=mac), [Linux](https://www.dropbox.com/downloading?os=lnx), and [Mobile](https://www.dropbox.com/mobile)
Linux Version includes support for Ubuntu, Fedora, Debian and also “Compile from Source” option is also available.
Mobile Version includes Android, iphone, ipad, BlacBerry and KindleFire.
[Download Page](https://www.dropbox.com/install)
2. ## [Copy](http://copy.jobnix.in)

Copy, A cloud for people, friends, and companies by Barracuda Networks. Upon FREE sign-up you will get 5 GB free space. Install the client app on any devices and you are ready to go, and Sync files between multiple devices.
Supported Platforms : [Windows](https://copy.com/install/windows/Copy.exe), [Mac](https://copy.com/install/mac/Copy.dmg), [Linux](https://copy.com/install/linux/Copy.tgz) and [Mobile
](https://www.copy.com/install)Mobile Version includes [Android](https://play.google.com/store/apps/details?id=com.copy) and [iPhone and iPad
](http://itunes.apple.com/us/app/copy-for-ios/id546789632?mt=8&uo=4) [Download Page](https://www.copy.com/install)
3. ## [SpiderOak
](https://spideroak.com/)

Spider Oak is 100% Private Online Backup, Sync & Sharing solution. On FREE signup you will get 2 GB of free space to store your data.They have client application for backup and sync.
Supported Platforms : Windows, MacOS, Linux (Ubuntu Debian based, Fedora rpm based, and Slackware based)
Mobile Version inlcudes : Android, iOS (iPhone and iPad)
Grab your client application from the [Download Page](https://spideroak.com/opendownload/).

That’s it, comment and share if you like it