This means being able to transfer your Minecraft Dungeons save files and characters from one PC to another is anything but guaranteed. PC is going to be the most complicated platform to transfer saves between, as PC is the only platform Minecraft Dungeons is available on that only uses local files for saves. Hopefully, Mojang Studios is hard at work implementing proper cross-save support using Microsoft Accounts, which powers cross-play, but players are left with only a few options until then. On top of that, carrying your progress between devices on different platforms just isn't possible right now. Without proper cross-save support, being able to carry your progress between different devices on the same platform depends entirely on the platform you're playing on.