CyberStor gloss for non-cybersecurity specialists FastBIT FastBIT is the most effective incremental backup technology available today. It uses a complex algorithm to precisely identify the changes that have been made to any type of file since the last backup, and the transfer of these changes to the server requires minimal bandwidth. Once the server receives these changes, it combines them with the previous backup to form an identical copy of your current file. For the end-user, the efficiency of FastBIT dramatically reduces the time required to back up data from any network location.