drop_upload() not works with ".wav" file

[Jelagmil]

Good afternoon,
when I try to save a ".wav" file

• drop_upload("file.wav",path='audio',dtoken = token)
  I get the following error:
  Warning: Error in curl::curl_fetch_memory: necessary data rewind wasn't possible
  If I change the file.wav to a "test.txt" it works without problems.