1. Whole drive backup
   1. CrashPlan
   2. Carbonite
   3. Backblaze
2. Collaboration/sync
   1. Dropbox
   2. OneDrive
   3. Google Drive
3. Photo backup
   1. Google+ Photos
   2. Flickr
   3. Amazon Cloud Drive
4. Music backup
   1. Google Music
   2. Amazon Cloudplayer
5. Video backup
   1. YouTube