Checkpoint64 has a preset for Baldur's Gate 3: it already knows where the save folder is, backs it up automatically and keeps every version. Everything this site has on Baldur's Gate 3:
Baldur's Gate 3
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Save file location
Windows:
%LOCALAPPDATA%\Larian Studios\Baldur's Gate 3\PlayerProfiles
macOS:~/Library/Application Support/Larian Studios/Baldur's Gate 3/PlayerProfiles -
Backup guide
Honour Mode keeps a single save that overwrites itself, and a mid-run mod change can break a 100-hour campaign. Checkpoint64 keeps every version of your BG3 profile folder, so a wipe or a broken load order is one click from undone. Free download.
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Launch options
--skip-launcher -
Sharing with friends
How to share your Baldur's Gate 3 world with friends, from playing live to taking turns when the host is offline.