I have dozens and dozens of back ups on my home screen. How do I stop ALL backups?
Incredibly frustrating on how to work on my book
Hi Scottfree. Welcome to the forum. 
First thing I’ll say, is that having your backups land on your home screen is not the best of places.
You should create a dedicated folder. It may be on your home screen if you want quick access, but at least the backups themselves are not gonna cluster it.
Go to Options / Backups (These are Windows version screenshots)
Set the number of backups to retain:
The various settings regarding when backups occur are on the top section of that same panel. As well as whether a backup is zipped and/or timestamped.
I recommend zipped + Timestamped backups.
→ The way I am set in my screenshot is for manual backups only. – Only when I decide.
I don’t recommend it so much, especially if you think it is the kind of thing (making a backup) you might in the long run forget about.
These settings (unless you’ve set a project to behave differently in Project settings) are common to all of your projects. You only need to set it right once.