Hi nasiflechette!
At first, try to clear your browsercache and re-install all web-plugins for battlelog. Additionally, you can try to use a different browser.
To deactivate the cloud storage function, go to Origin -> "My Games" -> "Battlefield 3" -> rightclick and choose "Game Details"
You will see your Game Details page, the second tab will bring you to the cloud storage options.
You can disable the Cloud Storage by unchecking the tickbox "Enable cloud storage...."
Cheers
Basti
