Hi - I have a problem very similar to https://support.mozilla.org/en-US/questions/1493859?page=1 I think. I am unlikely as technically savvy as user @iwright2 though. I am running a MacBookPro 14.1.1, Thunderbird 129.7.1esr Like the other user, this is no doubt due to my overstuffing of folders. I have, as a friend says, terrible computer hygiene. I can see from the size of the empty inbox that there are many messages there. These messages all display in AllMail and outbox. These are all embarrassingly large. I believe the problem stems from my searching on a string in one email's inbox and highlighting just these - they numbered n=60 I think, and I transferred them to an inbox on a different email account. They transferred slowly and after that, the entire first folder was empty. This is a mac, running a lot of different gmail accounts all as IMAP. Perhaps I need to restore some file, but I'm pretty nervous to do this. I will backup the computer first. I'm not sure what else to tell about or investigate. Is there anyone who might be willing to help see me through trying to restore these emails to visibility. I tried someone's suggestion to change the display parameters, but that doesn't work. I must have messed things up in the transferring. I can also try repairing a disk as suggested in the other thread, though I'm not sure that's the root of the problem, I think the transfer amid way-too-big-files is. Thanks - Huge Thanks!!! - if someone has a thought/suggestion as to where to start.