If you can't upload your WAV files quickly, use FLAC instead. It is like the .wav format, but smaller. Cleanvoice supports it now too. FLAC occupies 60% less space than a WAV file without losing much quality.
For a more technical overview, this article explains the differences quite well https://purdylounge.com/wav-vs-flac/
We increased the file limit per file now to 1.5 GB.