for backing things up, 99% of the data on my MiSTer are roms and disc images that are easily replaced. i wouldn’t bother using an SD migration script as it’s quicker and more flexible to add roms directly (it takes significantly less than a day, and i have significantly more than 300GB of games)
here are some relevant things to consider backing up
files:
- media/fat/MiSTer.ini (and any alternate .ini files)
- media/fat/downloader.ini
folders:
- media/fat/config
- media/fat/saves
- media/fat/savestates
- media/fat/screenshots
- media/fat/scripts (mostly replaceable but may contain some .ini files you might want)
other things you might want:
- any computer core .vhd you’ve made changes to (e.g. the AmigaVision saved games .vhd). for me, i need to backup my MacPlus .vhd so any changes i’ve made there are retained
- any special cores you’ve added that don’t come down through update_all (i put these all in _Alternatives so i can just grab that whole folder when backing up)
i’ll continue adding to this if i think of anything else but this is most of what you’ll care about losing and will be several orders of magnitude smaller than 300GB
easy mode: even if you just grab everything except the games folder you’ll probably still be slim; outside of the aforementioned specific computer core .vhds you may have edited, you’ll have absolutely everything