Yes, you can turn off the backups.
Go to Preferences > Backup > untick Auto-backup.
You may want to also deactivate Autosave. Go to Preferences > Autosave > untick Enable autosave
For some reason I'm having issues with saving, too, and it started just happening recently. There's a old thread about this, which I recently posted because I had problems, too.
I don't know if my project would have saved after a certain number of hours because I wasn't willing to wait that long.
In the thread I linked above, I first deactivated Auto-backup. But it wasn't enough because Autosave tried doing a back-up based on the frequency I had set it on. When Autosave kicked in, C2 was stuck again. Now I've taken off Autosave entirely and I've been working for about 2+ hours now we no issue so far. Hopefully it stays the same.
There's a possibility it could be related to the newest build, but who knows?