Evolution of Cloud Storage

SkyDrive

08/01/2007
08/09/2007
05/22/2008
12/02/08
12/02/08
06/07/10
06/20/11
11/29/11
12/03/11
04/22/12
08/14/12
08/28/12

Google Drive

01/13/10
03/07/10
06/01/10
09/29/11
04/26/12

iCloud

06/06/11
06/30/11
08/03/11
10/12/11
10/19/11

Dropbox

09/08/08
10/10/09
05/05/11
05/19/11
10/01/11
12/02/11
04/04/12
09/26/12
11/12/12
12/19/12