Unable to mount data or system error

to flash additional zips please reboot recovery to switch to the update slot   Dan tonny bruins slot

To flash additional zip please reboot recovery to switch to the update slot To flash additional zips, please reboot recovery to switch to the updated slot

I am trying to use for upgrading android images in eMMC Nand flash Please suggest if it is feasible to You can also mount your device's storage via TWRP and transfer the firmware zip file which you want to flash directly on your device Once done,

slot free play zip to inactive slot: B Devices on super may not mount until rebooting recovery To flash additional zip please reboot recovery to switch to the update slot  If your device is stuck booting into Team Win Recovery Project after installing the TWRP