Recovery/Live image?
#1
Question 
I would like to boot my Pro from a MicroSD card and backup the eMMC. Once booted from MicroSD, I want to enter the CLI and run the `dd` command or whatever (obviously, this should not be done on the live system booted from eMMC).

What kind of image should I flash onto the MicroSD card? Will any of the images for OS installation do, or are they only good for actual installation and not for live trial/recovery purposes?

UPDATE:

PostmarketOS regular image works very well for this purpose (need to install Tow-Boot to the SPI first).

I also tried to simply use the Tow-Boot's USB Mass Storage mode to directly access eMMC from laptop, and it initially seemingly worked, but the phone would arbitrarily reboot itself during the backup process.
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