My partner finished recording (remotely) and saved the file as a project. He then attached that file and emailed it to me. I am unable to open it. It says it cannot find the project data folder. Any suggestions? Thank you
Audacity projects are not really suitable for email. Generally it is better to export an MP3 file and send that.
See: https://manual.audacityteam.org/man/audacity_projects.html