For a typical system on a typical broadband line, and if you continue working on your computer during the backup, PC Backup backs up data at the rate of about 2-4 GB per day. If left undisturbed on a fast connection, however, you can back up over 9 GB in a single day. You may experience faster or slower speeds depending on your connection.
During installation, PC Backup tests your bandwidth to ensure your Internet connection is fast enough. If you want to get an estimate of the transfer rate before you begin your initial backup, you may want to use a bandwidth meter to measure your broadband connection speed. We recommend using the meter from Speakeasy or Speedtest.net.
After your initial backup, subsequent backups are relatively quick. Chances are that you won't even notice them. This is possible because PC Backup performs what are called differential backups, which means that it only backs up the portions of your files that have changed since the last time they were backed up. This saves lots of time, bandwidth and storage space.