Booting Operating System from SSD USB drive

[angus]

On Linux or Mac (or any other Unix) you can use dd on the command line.

Best/preferred method to backup working sd card images?

We typically recommend using multiple MicroSD cards. But if that is cost prohibitive, you can backup the entire raw disk using Linux’s dd command. Put the MicroSD card in another computer and use: sudo dd if=/dev/BLOCK_DEVICE bs=1M status=progress | zstd > IMAGE.img.zst Replace BLOCK_DEVICE with the device that the MicroSD card. To restore: zstdcat IMAGE.img.zst | sudo dd of=/dev/BLOCK_DEVICE bs=1M iflag=fullblock status=progress You can give it a try to make sure the command works properl…