A project file (extension *.cpr) is the central document in Cubase. It contains references to the media data that is used in your project.
We recommend to save project files in the project folder. You can specify the location of the project folder in the Hub.
In addition to the project files, the project folder contains the following folders that Cubase automatically creates, if required:
Audio
Edits
Images
Track Pictures
Important
Project file sizes larger than 2 GB are only supported by program version 13.0.30 or newer. If a file exceeds this limit, you can choose to reduce the project size in order to maintain compatibility with older versions.