Notes about the Z80 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The Z80 file type is primarily associated with 'Z80'. This file format, developed primarily by Gerton Lunter, should be able to be recognized by any of the Spectrum emulators.