C1900universalk9mzspa1583m7bin

He sat on the cold raised floor, typing frantic queries into a laptop tethered to a dying mobile hotspot.

: Describes where the image runs and its compression format. "m" means the file runs from the router's RAM, and "z" means the file is compressed using zip/gzip format to save storage space. c1900universalk9mzspa1583m7bin