Hello, I downloaded Thunderbird in order to clean up storage on gmail account. Mainly, I wanted to delete files but keep the messages, a feature I thought Thunderbird provides. I deleted the files but they still appear on my gmail account and space size hasn't changed. I double checked the settings on both Thunderbird and gmail, as well as read and followed posts here, but it still doesn't work. I'm wondering whether I'm missing something... Any idea?