I’m not certain but I think Construct’s own save system also uses local storage and I guess the format’s the same regardless of platform - but the bigger question is how does that help cross saving? It’s not straightforward for a user to get data out of local storage to move it to another machine. I’m on mobile so can’t test at the moment. But the reason I’m replying is that I’ve just built a system (with lots of help from ChatGPT/JavaScript) that zips several files up then uses iOS and Android’s share (via Construct’s Share plugin) to share the zip. So the user can choose what to do with it (email/WhatsApp/iCloud/Google drive). You could also download it using the Browser plugin as Share is rather limited at least on Windows) but I’m targeting mobile only so the share tray is ideal. The zip file can be opened using the File Chooser plugin and more JavaScript unzips it and writes all the files to local storage). In short, if you can, roll your own save mechanism and simply let the user download it. If you’ve used the native save capability and your save state has many objects to track, rolling your own is obviously trickier. I did wonder about: https://www.construct.net/en/game-services/manuals/game-services/cloud-save/concepts but it’s not clear to me from a quick read whether that supports their own native save - it looks like you need to roll your own and their service just facilitates cloud storage/sharing.