Sometime you might to want to flash your rock, for trying another OS or upgrading or just fun. But there is risk of losing data when flashing. And Flashing the bootloader will wipe all your data, so backup is important.
You can back up your Android apps on RR with ADB. First you need to get adb working on your Desktop/Laptop. Refer ADB under Windows or ADB under Linux to get adb connected on your Desktop/Laptop. The following instructions assume you have a working adb.
Get a backup with
adb backup -apk -shared -all
Confirm the backup on the Radxa
To restore the backup
adb restore backup.ab