Change Time Machine Options preferences on Mac
On your Mac, use Time Machine Options preferences to specify items you want to exclude from backups and change other options.
To change these preferences, choose Apple menu > System Preferences, click Time Machine, then click Options.
List of excluded items
Items you selected to exclude from backups.
To exclude items from backups, click the Add button , select the items, then click Exclude.
To remove an item from the list, select it, then click the Remove button . The item will be included in the next Time Machine backup.
Back up while on battery power (Mac notebooks only)
Create backups every hour even if your Mac is on battery power.