Deleteing .back files?

I have noticed I have a ton of .bak files on my computer. Cubase clearly creates these files each time I save a project. Is it ok to delete these or will this effect the main file? Thanks!

No, delete them as long as you don’t think you’ll need them. I think that there is a setting somewhere (in prefs?) where you can select how many bak files will be saved before being overwritten.