hello
is it possiable to clean up bak files in a project folder as I have some times 15-50 bak files? do I need to keep them there or should I make a separate folder for backup/
You can delete as many of the backup files you want. You would do that from your computer file explorer screen. Keep a few of the later ones and make sure you do not trash the current .cpr project file.
Storing them in a separate folder would be your choice. You would have to create that folder and move them there manually as Cubase will not do that automatically. If I was to do that (which I have no reason to do) I would create the separate folder as another folder under the project folder and be sure to only keep that project backups in it. IMO… It is not a good idea to put files from different projects into one folder as things will get confusing.
I changed my auto backups to 5 max. I have no need to have more than that. That setting is in the Cubase Preferences, General menu.
Regards 
Thanks for the info that is very helpful… thanks for the quick response…
Good idea. I’m a stickler for organization and the multitude of .bak files to drive me a bit crazy. I can’t think of any reason to have more than five or so. Especially since, if I make any huge/potentially irreversible changes to a project I normally save a new version