Best audio file type for import?

I was importing a ton of .wav stems into a Cubase project, and the import was taking a long time. What’s the best audio file format for Cubase to be the happiest?

WAV is a great format for Cubase.

But: Is it the best?

(Considering both quality of audio and quickness of import)

wav should be the fastest format to load, depending on what sort of media you are using.
Loading from a slow usb thumb drive, FLAC would probably be faster.
Any lossless format that Cubase supports are the “best”

Excellent, I shall stick with WAV - Thanks!