I have a raspberrypi 3b

[saki]

I have retropie stretch what is the best way to upgrade to buster

[niyoki]

@saki I own a Raspberry pi 3 b+. I had to fresh install Retropie 4.8. I tried to upgrade but at he end fresh installation is the better way to choose. I didn't transferred configuration files to the new install. Just transferred bios files and the roms. But at he and I#m reall happy.
Kind Regards
Niyazi

[saki]

I like to keep configs. What files are critical I need to backup then restore to a fresh copy

[niyoki]

@saki hello,
Actually for the backup you need to read this section on the Retropie documentation website:

https://retropie.org.uk/docs/Updating-RetroPie/#backup-option-2

but be warned, if you would use any preconfigured third party sd-cards, it can be really time consuming. And some of the configuration files can cause extra stress.

Kind Regards
Niyazi

[sleve_mcdichael]

@saki said in I have a raspberrypi 3b:

I like to keep configs. What files are critical I need to backup then restore to a fresh copy

Over network share: roms/, bios/, configs/.

Or off the filesystem/SD image (these are the same directories, by different method):

/home/pi/RetroPie/roms/
/home/pi/RetroPie/BIOS/
/opt/retropie/configs/

[niyoki]

@sleve_mcdichael I prefer DiskInternals Linux-Reader and save above folders to my windows computer via sd-card reader. Over network also possible.
Kind Regards
Niyazi

[saki]

@sleve_mcdichael thank you Is it possible to back up the fruitbox and themes

[sleve_mcdichael]

@saki I don't know what fruitbox is. Default themes are in /etc/emulationstation/themes which is not backed up over the network share but you can copy (or move) them into the "custom" location at /opt/retropie/configs/all/emulationstation/themes and they will be included.