Same game on multiple systems overwriting save files

First and foremost consider this:

• Only RetroArch bugs should be filed here. Not core bugs or game bugs
• This is not a forum or a help section, this is strictly developer oriented

Description

I have two ROMs: Dynamite Headdy for the Mega Drive, and Dynamite Headdy for the Game Gear. I use the Genesis Plus GX core for both of these systems. Both these games save as .srm. Each time one game writes the file, the save from the other platform is lost.

Expected behavior

Solution: allow option to organise saves by platform.

Actual behavior

Saves are being overwritten across multiple platforms.

Steps to reproduce the bug

1. Play Game Gear Dynamite Headdy (Game Gear .srm file saved).
2. Play Mega Drive Dynamite Headdy (Mega Drive .srm overwrites Game Gear .srm file)

Version/Commit

You can find this information under Information/System Information

• RetroArch: 1.8.4

Environment information

• OS: Windows 10

Start by reproducing the two-step scenario with Game Gear and Mega Drive versions of Dynamite Headdy using Genesis Plus GX on Windows 10. Trace how each .srm save path is selected and determine where platform-specific organization could be applied. Done means both platforms retain separate saves, with coverage for the reported sequence.