How To Setup Autosaves for your Factorio Server
Normal Factorio behavior saves all updates to _autosave files. This can be a
detriment because if your server ever crashes for some reason your primary
save will not be updated with all your latest changes. Upon reboot, the server
will load your primary save you named which may be days or even weeks behind
in progress and then overwrite the _autosaves as the autosave time period is
triggered.
Unfortunately there isn’t much we can do about this behavior but we do have a workaround on our platform that can protect you from lost progress.
We recommend the following command setup in our panels scheduler.

Then Create Task and set up the Send Command payload to be /server-save

This will force Factorio to save your server to its main save file twice a day.