Toshiba continues to push the envelope on small form factor storage with its latest market introduction, a multi-gigabyte hard drive that is 0.85 inches in diameter.It was in June that we announced Toshiba had cracked the 2 GB barrier with its .85 inch hard drive so we guess it was about time they announced another breakthrough – at IFA this week, the Japanese company announced that the same drive has now been increased to 4 gigabytes capacity