M277z.7z -

: Right-click m277z.7z and select "Extract Here." This will usually reveal an .exe (for Windows) or .dmg (for Mac) installer, or a raw .ful firmware file.

: Use a free, open-source tool like 7-Zip or PeaZip . m277z.7z

How to Manage HP M277 Firmware Updates: Dealing with "m277z.7z" : Right-click m277z