So, I'm thinking I'm missing something obvious. A half hour of searching and I can't find the solution. Hopefully someone can help me. I recently upgraded Thunderbird to 78.1.0. Upon startup I was waiting for a message to sync that I can see on my phone (I have not opened the message on my phone). I tried syncing several times with no success. Restarted PC and Thunderbird and confirmed solid internet connection. A suggestion I came across while troubleshooting was to "repair folder". Seemed easy enough. Well once I selected that option ALL MY EMAILS IN MY INBOX HAVE DISAPPEARED! I have waited about 20 minutes with no messages appearing. Am I missing some major easy detail. I had no idea that an option called "repair folder" could result in the disappearance of all my messages. Trying to remain calm in hopes there is a simple fix. I apologize if this is a common issue that I am overlooking. I have tried to solve it with the extent of my knowledge.