Which medkit are you using? Can you provide a link to the image?
One of your pastebin dumps it lists a file called turris1x-medkit-202011130923.tar.gz – if this is the medkit you’re trying to flash it would explain why it isn’t working, since it’s for the Turris v1 version (different hardware). Also, can you confirm the filename on the USB drive is omnia-medkit-latest.tar.gz? I’m not sure how much flexibility we have in terms of file naming but I can confirm that it did work for me using this file name.
Correct, that was a mistake before I found out that I had to have the omnia-medkit-202011130855.tar.gz, which I subsequently used. Unfortunately that didn’t work either. I did try renaming it to omnia-medkit-latest.tar.gz but that didn’t work too.
Hm, I’m slowly running out of ideas here. I can provide you with the steps that worked for me. I’d just go through the whole procedure again to rule out any assumption-based issues:
In the download folder: cp omnia-medkit-latest.tar.gz omnia-medkit-202011130855.tar.gz; shasum -c omnia-medkit-latest.tar.gz.sha256; rm omnia-medkit-202011130855.tar.gz (the .sha256 file contains the wrong filename).
Determine the USB drive device, then use fdisk to remove any partitions, create a standard MBR partition table with one physical partition; save
mkfs.ext4 <your new partition>
Mount newly created ext4 filesystem somewhere, copy omnia-medkit-latest.tar.gz to it, leave away the checksum