Firmware for the Acer Aspire 4720Z, labelled z01, stored without a file extension and 1.00 MB in size. That size matches an 8 Mbit SPI flash chip, so it is likely a raw BIOS dump. The z01 tag is not explained in the name and may be a version or board marker. Technicians write such images with a programmer to recover a bricked board. Check the flash chip capacity and motherboard number before use, and read and save the original chip first.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @ComputerBIOSBinFile. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →