I installed the game on F drive because reasons. The game stores saves on C. I do not remember making this choice but there it is.
To make space on C, i removed a bunch of old saves. Now Farthest Frontier will not start up. I get a message that steam cloud is unable to sync and would I like to play anyway. Yes I do. And then I wait forever, and nothing happens.
Your saves are in your Documents\My Games folder, whereever that may be on your PC - by default this is on C.
But you can also move it to a customer folder like I do: D:\eisprinzessin\Documents\My Games\Farthest Frontier\Save
As you are using Cloud Saving, local copies of your saves are put in a subsubsubfolder of your Steam installation - by default: C:\Program Files (x86)\Steam\userdata