Exporting brush sets enables you to back them up, and also to share them between your devices or with other people.
Exporting brush sets in Sketchbook Pro for desktop
- In the Brush Library, tap the brush set you want to backup or share.
- Tap-hold
and select 
Export Brush Set.
- Navigate to where you want the set saved and tap Save.
and select 
Export Brush Set.
Exporting brush sets in Sketchbook for mobile devices
Exporting brushes is unlocked with the purchase of the Premium Bundle.
- Tap
to open the Brush Library - Tap any brush in the set you want to export to post the menu
for that set. - Tap the menu and choose Export
- The file browser will launch. You have the opportunity on this screen to rename the file if you want to. Navigate to where you want to save the file and tap Save in the upper right corner.
to open the 
for that set.