I use GOG Galaxy to launch my GOG games.
I have a savegame in Diablo 1.
When I exit the game, I do not see GOG uploading a savegame to the GOG cloud.
On https://www.gog.com/account/cloud-saves/page/1 I do not see Diablo in the list.
In GOG Galaxy > Settings > Game Features, I have turned all options on (including Cloud Saves).

Do you have a suggestion what I could do or check so that I understand why diablo 1 savegames are not upload to the GOG cloud?

I think it might be some semi-rogue-like save system, where death is permanent, so that you can't use savedd games to go back and "cheat" if you die. Diablo IS a roguelike after all...

I don't see cloud saves being available for Diablo 1 or at least I don't see it mentioned in game features on the store page.

Thank you, this is something I was looking for: something to check.
I see cloud save as a feature on sim city 3000 and yes, that save file is in the gog cloud.
I don't see the feature on the diablo store page and I don't see the save in the GOG cloud.

So for now my question is answered.

If you need to transfer saves, you can use an app like Syncthing to do so.

wow, thank you. Great tip