I am using Thunderbird's local folders to free up space in my gmail account for older E-mails that I don't need anymore. I set it up as IMAP. I'm having the following problems: I have an entire Label tree in gmail that shows up as a Folder tree in Thunderbird. I have duplicated some of these into a Local Folder in Thunderbird. - When I move a folder down, all the messages copy, but don't delete from Thunderbird or gmail. When I delete the messages in Thunderbird, sometimes they delete in gmail, but other times, they remain in gmail without a label. - I've also tried Moving the individual messages (in group) from the gmail folder in Thunderbird the local folder. Sometimes they delete in gmail, but other times, they remain in gmail without a label. I've sometimes hit Undo, and some of those times, the messages go back, other times they don't, and I have 2 blank folders. The messages are still in gmail, but without label, so not easy to find. As well, in File Manager, there's a file with that folder's name, and it is non-zero, and when I open it up in a Text Editor, I see the messages. - I've also tried Copying the individual messages (in group) from the gmail folder in Thunderbird the local folder. Then I delete them from the source directory. Most of the time, this works. but a few other times, they remain in gmail without a label. One thing - since I just installed Thunderbird today, it's still downloading messages. It's at 37000 of 66000 messages right now, if that could be related to this. But when do move/copy/delete one at a time, it happens immediately. Any suggestions on a better way to do this?