How do I do that?
You can look at the Kodi Wiki but, as this was written by sad nerds, it is far too brief and unusable for normal people!!!
What gets backed up:
*User Addons - Addon's you've downloaded
*Addon Data - Settings associated with your addons
*Database - The SQLite Databases
*Playlists - Your playlist folder
*Thumbnails/Fanart - downloaded images
*Config Files - sources.xml, guisettings.xml, advancedsettings.xml, etc
*Up to 2 non-Kodi directories on your local system (optional)
Before you install Kodi Backup you need to create a folder on your hard disk to store these backup files.
CREATE A BACKUP FOLDER
You only need to do this once!
Click on Kodi "Tools" icon (the wheel on the top-right)
Click on "File Manager"
Click on your HiMedia HDD (not the SDCard!)
Press the "Menu" button on your remote
Select "Make new folder" and press "OK"
Name your folder "Kodi Backups"
Go back to the Kodi main menu and highlight "Addons"
Click on the Backup tile that's just been added
Click on "Open settings"
Click on "Browse for remote path"
Click on "Kodi Backup" (or whatever you named the folder)
Click on "OK"
(This will appear as /storage/sda2/Kodi Backup)
Now click on "File Selection"
Select all of the files except the Custom Directories
Click "OK"
TO RUN A BACKUP
Click on the Backup tile
Click on "Backup"
Go away and make a cup of tea/coffee because the backup can take up to 30 minutes!
TO RUN A RESTORE
Click on the Backup tile
Click on "Restore"
A list of Backup appears, named as the date and time of the backup. The most reset backups are at the bottom of the list!
Click on the Backup you want restored
Go away and make a cup of tea/coffee because the restore can take up to 30 minutes