Which is your favourite online/offline synced drive, Google Drive, SkyDrive or Dropbox? They are all free so there's actually nothing to stop you adding all of them and getting 15Gb of synced online storage space! You may not have realised it, but it is possible to integrate them into Windows 7 libraries so they are the default save location for documents and other files. Here's how.
Let's assume that you have already installed Google Drive, SkyDrive or Dropbox and have one or more of these up and running on your PC. Click the Explorer icon in the taskbar and the four libraries are displayed in the window. Right click a library, such as Documents and select Properties.
The Properties window shows the folders that are included in the view when the Documents library is opened. Click Include a folder and then using the browser, go to your home folder (C:\Users\YourName) and open SkyDrive, Google Drive or Dropbox.
You can include the whole drive, but if you have a Documents folder, open it and click Include folder. Select it in the list and click Set save location. The folder that is ticked is the one that files are saved to when you save to the library or drop files on the library.
Click OK and from now on when you open the Documents library you will see your online drive files displayed too.
If you have a folder in your online drive for photos, you can add it to the Pictures linrary in the same way. Only one folder, SkyDrive Documents was added to the Documents library in the screen shot, but you can add folders from other online drives too. Add Dropbox and Google Drive in the same way.