If you want to save the existing brush to import into another computer, open the Brushes panel and select all brushes. Then click on the menu button and select Export Selected Brushes. The brush will be saved in ABR format.
See also: Top 10 websites provide a free Photoshop brush
If you want to arrange, manage brushes better (when you have many types of brushes for many projects .) you can copy the ABR file into the Brushes folder on the Photoshop folder of the system. (It is not necessary to install a new paint brush).
Links for Mac users: Macintosh HD / Applications / Adobe Photoshop CC 2018 / Presets / Brushes
Path for Windows users: C: Program FilesAdobeAdobe Photoshop CC 2018PresetsBrushes
Coming to Christmas, wish you create shimmering artworks with brushes in Photoshop!
See also: Tutorial to create a sparkling snow effect using Photoshop Brush