Save Backups Questions

Hi! I'm confused about something. I tried finding the answer on Stardew Valley WIKI and others, but couldn't. So sorry for making a new thread.


My question is:

I copied my save files today (January 30th) as a backup. If I play tomorrow and afterwards, do I have to copy my save files again so I have an updated backup? Like, do I have to do this every time I play the game to have the most recent playthrough backup? For example: if I played again on February 8th but something goes wrong when I try to play on February 9th, if I restore my save from this backup I made on January 30th, will it be my playthrough from January 30th? Or it will be updated (from the last time I played it, therefore from February 8th)?

Thank you so much for your attention!