Checkpoint64 has a preset for Don't Starve Together: it already knows where the save folder is, backs it up automatically and keeps every version. Everything this site has on Don't Starve Together:
Don't Starve Together
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Save file location
Windows:
%USERPROFILE%\Documents\Klei\DoNotStarveTogether
macOS:~/Documents/Klei/DoNotStarveTogether
Linux:~/.klei/DoNotStarveTogether -
Backup guide
Don't Starve Together runs a hidden server even when you play solo, and a crash mid-autosave can corrupt the world you've survived hundreds of days in. Checkpoint64 keeps every version so a bad save is one click from restored. Free download for Windows, macOS, and Linux.
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Server ports
UDP 10999 -
Sharing with friends
How to share your Don't Starve Together world with friends, from playing live to taking turns when the host is offline.