May 20, 2012 | Geeks Union
Your first Time Machine backup will be several gigabytes because it is backing up your entire computer. This may take overnight or longer, depending on how much data you have.
Once the initial backup is complete, all subsequent backups are incremental. That means Time Machine copies only files that have changed since the previous backup. All of this happens automatically in the background.
Tips for your first backup
You should let the initial back up process complete without interruption.
If Read more [...]