[Resolved] Failure copying stock firmware to USB; cannot proceed

Flashing Full UEFI, Firmware backup fails.
CP: cannot create regular file ‘/tmp/usb/stock-firmware-LICK-20241029.rom’: Read-only file system

–battery is unplugged for this model.

Lenovo Ideapad 3 chromebook
Board - LICK
Platform - Intel GeminiLake
Fw WP - Disabled

ran fdisk while the usb is plugged in and it shows as both dev/sda and dev/sda1

checked the flash rom, and its shows protection mode: disabled

Super stumped at this point, please advise

Your USB stick is not correctly formatted.

If you have a linux or windows machine, you can delete all partitions on the stick and create one FAT32 partition

Look at my recent guide for screenshots

Fully reformatted two usb sticks I have used to flash other os’s in the past. one is usb 2 and the other is 3.0.
Both are fully formatted to fat 32.
Used both windows as well as a debian latop to remove all partitons and just format as fat32.
Next test might be to format using fdisk in vt2.
attached is one of the usb drives as fdisk sees it.

Quick follow up.
On a whim, formatted a microSD, and it was able to be written to.
Marking as resolved.

Strange.

It may be that your USB sticks are broken. I have this with 2 of mine.

I currently try to fully overwrite them and then flash

lsblk
# stick is sda

sudo dd if=/dev/urandom of=/dev/sda status=progress && sync

Then create a new GPT partition table and a FAT32 partition. In KDE partitionmanager make sure it is writable by everyone, not just root.

No idea what Desktop you use on Debian, they have Mate as default for whatever reason