Hello there We have read the message. We try to help.

Can you send me a screenshot of the message?

antivirus software can sometimes disrupt the cooperation of both, what then happens is that slowness occurs or problems arise. Shut down monitoring or the security software if that is possible.

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

How is the diskspace from the computer

Is there still enough space on the hard drive of your computers?

If you have added a limit on your PC for this, please check this as well.

Greetings Firefox volunteer.

Hello there

https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem

https://support.mozilla.org/en-US/kb/profiles-where-thunderbird-stores-user-data

Greetings Firefox volunteer

Hello there

what I mean is to check your hard drive where you keep your profile folder to see if this hard drive is still okay.

Transfer the profile map to a another place to check if it s still intact.

is your profile folder still okay? Send me a message after that. If possible.

Greetings Firefox volunteer

Elizabeth

Did you solve your problem?

Compact is being rewritten for version 128, coming out this summer. If you have trouble with that version, then please post a new support topic.