While trying to move emails from my inbox to a folder, several months worth of emails disappeared. I've tried doing a global search for them, but there's no trace of them. I have access to the same email account using Thunderbird on two separate Macs. So one computer's Thunderbird has all of my emails, but the other computer's Thunderbird is now missing those several months. I've tried using a Time Machine app to reverse the Thunderbird profile folder in the Mac's Library, but that didn't work. Can I take the Thunderbird folder from the Mac's Library on the unaffected computer and simply copy-and-paste to the affected computer? When I tried looking up other help articles about doing this, I'm reading warnings that this action could negatively affect the emails on the good computer. I also want to ensure that I'm copying the emails from the good computer, and not exporting them, thus removing them from the good computer. I want to continue having the same emails on two computers. I'm also open to other suggestions for how to retrieve my lost emails. Thanks in advance for responses on this.