Flashing SC card for Ubuntu Touch

[thorensjubilee]

Hello,

I'm a NOOB. I have an Ubuntu computer and a Windows 10 computer. I have also had a stroke. I have just bought my Pinephone with Manjaro on it, but it has Postmarket OS on it instead. I want to flash my phone, but am not sure how to do it. I followed the following instructions:

Detailed usage instructions

1. Download the Jumpdrive image
   
2. Flash the Jumpdrive image to a micro SD card
   
3. Boot the PinePhone from the Jumpdrive micro SD card
   
4. Connect the PinePhone to your computer using USB-A -> USB-C cable
   
5. Flash the exposed PinePhone drive (e.g. /dev/mm..., check for the right device in dmesg, GNOME disks, or similar, and make sure it's unmounted) with your chosen OS image
   
6. Once the flashing process is complete, disconnect the PinePhone from your PC, power it down and remove the Jumpdrive SD card
   
7. The process is now finished, and you can boot from eMMC
   

I got the Jumpdrive image on my pinephone saying that it's ready to go but then (point 5) I'm not sure. How do I flash my pinephone? Do I use etcher? Also, which computer is easier, the Ubuntu or the Windows?

Many thanks,

Chris