What does back up while on battery power mean?
The purpose of the switch “Backup while on Battery Power” is for you to choose if to continue the time machine backup while on battery or NOT. The reason is to allow you to preserve battery power by unchecking it, but it will no longer create Snapshots.
Can you use your Mac while doing a Time Machine backup?
The first backup may take a long time, but you can continue using your Mac while a backup is underway. Time Machine backs up only the files that changed since the previous backup, so future backups will be faster. To start a backup manually, choose Back Up Now from the Time Machine menu in the menu bar.
How does Time Machine backup on a Mac?
Your Time Machine backup disk might not always be available, so Time Machine also stores some of its backups on your Mac. These backups are called local snapshots. When your backup disk isn’t available, Time Machine automatically uses local snapshots to help you restore files.
What do local snapshots do on Time Machine?
About Time Machine local snapshots. Time Machine lets you restore files from local snapshots of the files on your Mac, even when your Time Machine backup disk isn’t available. Your Time Machine backup disk might not always be available, so Time Machine also stores some of its backups on your Mac. These backups are called local snapshots.
How much space does a time machine take up?
Enable Time Machine on your MacBook and it will create “local snapshots,” too — potentially taking up over 100 GB of disk space on its internal storage. These local snapshots appear as “Backups” when you look at the visual overview of storage in the About Your Mac window.
When to start purging time machine local snapshots?
When less than 20 percent of the space on your Mac’s startup disk is available — or if less than 5 GB of space is available — your Mac will start automatically purging the oldest Time Machine local snapshots to free up space. At less than 10 percent or 5 GB available, your Mac will become even more aggressive.