In Windows 7
Click Start > Control Panel > System and Maintenance > Backup and Restore. Here, you are presented with two options 1 Make a full backup of the system: In the left pane, click Create new, full backup. 2 Customize the archival: Click Set up backup and then follow the wizard to configure what you want to make a copy of. After that first time, whenever you bring up Back and Restore, just click Back up now. To restore your data, double-click the backup file to start the process. Alternatively, open Backup and Restore > Restore my files. Browse through the backup and choose the files and folders you want to restore; select the destination and click Restore.
In Windows 8.1
Connect an external hard drive to your PC. Then, using your cursor, point to the upper right corner of the screen. In the 'charms' bar that appears, click on the Search option and type File History to access it. Enable the File History option and follow the instructions to select the folders you want to backup. You can restore files from earlier copies with the same utility.
Dropbox
This service gives you 2GB of free storage. If you suggest it to friends, you can earn up to 18GB of space. Dropbox also has software for Windows, Mac and Linux PCs, and apps for Android, BlackBerry, and iOS devices. To back up a file, place it in the local Dropbox folder on your PC and it will be pushed online, showing up on your smartphone as well.
Google Drive
Google Drive offers up to 15GB of free space which is shared across Gmail and Google+ services. While Drive is not ideal for multimedia file storage, it is perfect for documents, with support for over thirty formats that can be opened within the mobile app - available for Android and iOS - or the web browser.
Box
With 10GB of storage space, you will have more than enough room for backing up personal and work-related documents. If you are not into taking your photographs public on Flickr and Picasa, you can store them on Box. Entire folders can be shared with friends and family, turning the backup process into an advantage. Just make sure you don't give write access to those with whom you share the folder. Besides mobile apps for Android and iOS devices, Box also works on Windows Phone.
SkyDrive
With SkyDrive, you get 7GB of free space and the ability to work on documents within a web browser or its app that's available for Android, iOS and Windows Phone. This service works well with photos too: it comes with a slideshow function and supports sharing on social networks.
Backing up with Windows
You can also use the built-in backup and restore utility in Windows. The best part is that you can schedule and automate the entire process with the help of a simple wizard.
