Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

What happens to compressed email files? Can I delete them from my hard drive? Where are they?

Every so often Thunderbird asks to compress Emails to conserve space. These are "deleted" Emails that I no longer want or need. So how do I completely wipe them from my hard drive once they have been compressed? Where are they on the C Drive after the compression process? Are they deleted automatically? I use only POP Email and only from my desktop machine.

Every so often Thunderbird asks to compress Emails to conserve space. These are "deleted" Emails that I no longer want or need. So how do I completely wipe them from my hard drive once they have been compressed? Where are they on the C Drive after the compression process? Are they deleted automatically? I use only POP Email and only from my desktop machine.

All Replies (1)

I do not know about compress emails but you can learn about the Compact function of Thunderbird here. Hint... It has nothing to do with compressing or zipping files.

https://support.mozilla.org/en-US/kb/compacting-folders