Your files stay put
There is no account and no upload of your save. The reference data lives in the app. A save you open is read on that computer.
Subspace Foundry makes games, tools, and companion software. Atlas Field Kit is the first release, an unofficial companion for No Man's Sky, and it keeps its work on your machine. Games and other tools will follow from the same shop.
These are the rules for this release. A later tool that reads or writes a player's own files will follow them too.
There is no account and no upload of your save. The reference data lives in the app. A save you open is read on that computer.
Edits wait on the screen where you made them. Save all stores a backup of the save pair, then writes the file. Restore puts that backup back. After a write, reload that slot from the game's save list.
The browser copy is there for a second screen: recipes, the guide, glyphs, and expeditions. Watching the save folder, writing the save, and Windows notifications need the helper that ships with the Windows app.
Atlas Field Kit is the first release. A later project will be listed here when it has a name and something you can look at.
Subspace Foundry is at the start. The shop will ship games, general tools, and more companion software. Until a project has a name and something you can look at, Atlas Field Kit is the work you can use.
Questions, bug reports, and ideas go to the studio account on X. That is the channel we answer.