I get Formatting user disk failed error when trying to use SDDiskTool_en_v1.53 according to manual 
From tool log:
11:17:38 536 Rockchip Create Upgrade Disk Tool v1.53 start run
11:18:00 894 Start to write MBR…
11:18:01 112 Start to write Loader…
11:18:01 175 Start to write firmware…
11:18:01 190 Writing parameter…
11:18:02 190 Writing trust…
11:18:03 065 Writing uboot…
11:18:03 675 Writing misc…
11:18:03 847 Writing boot…
11:18:08 612 Writing dtbo…
11:18:08 802 Writing vbmeta…
11:18:08 815 Writing recovery…
11:18:16 441 Start to format user disk…
11:18:16 582 Error:FormatDrive failed,err=-13