backup

I got a new phone and can see my saved backup file on my device but don't know how to transfer that to the actual game. Can anyone please help? I've looked around everywhere but the wiki doesn't have complete answers.

Now I'm trying to buy a PC, already 80% done on my quest for a computer. But I don't know if I should buy stardew valley again to PC, since I brought to mobile. Do I need to buy other copy? If I do, how do I get my character and farm back on PC? Sorry for any misspelling.

This has been an issue for the past three days. The other day I went to play my game and it had jumped me back to Day 5 when I was on Day 7. The next (in real life) day, I took the advice of a Reddit response, and turned off Steam's "cloud synchronization". I then played the game, exited to...