How to Fix – “Mozilla Thunderbird Error Writing Temporary File” Error?

THUNDERBIRD ERORR

Thunderbird is a great desktop email app that many people use to share information, keep data safe, and keep track of events. People all over the world have relied on this email app to send and receive emails safely. But it does have some pros and cons. Today, we’re going to talk about one of its errors and how to fix it properly. This is the warning that Thunderbird gets when it tries to write a temporary file. Thunderbird shows an error message that says “Writing Temporary File Error” whenever a user tries to send an email with this error. The image below shows how this message looks on the user’s computer. This user’s question below will help you understand this mistake better.

Question: “Hey everyone! I’m having a terrible time with my Thunderbird. When I try to send an email, I get an error screen that says “writing temporary file.” There are hours that I have already spent trying to fix this, but I still can’t. I have restarted Mozilla Firefox, cleaned up my folders, and tried setting the file system cleanup to “privileged” at the C:/TEMP folder. But it was all for nothing! I love Thunderbird and don’t want to switch. It’s not clear to me which file or place it can’t write to. Could someone please show me how to fix errors? I need help with this a lot. Thanks!

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How to Fix “Error Writing Temporary File”?

We’ve come up with some useful techniques and methods to fix this “Writing Temporary File” error in Thunderbird after listening to what users had to say. Now, let’s look at the different things that can be done to fix this Thunderbird problem.

Step 1: Make a copy of the profile –

The profile folder is a folder on the user’s computer that holds Thunderbird files such as Preferences, Settings, Themes, and more. Making a copy of this data is important, but make sure the copy is not on the same disc as the personal folder. There are two ways to make a copy of the Thunderbird personal folder. Here are those ways.

(i) Method by Manual

First, make the saved files smaller by getting rid of any files you don’t need. To do this, you need to compact groups in Thunderbird. By compacting, the application works faster because the extra room is freed up. The steps below describe the process of compacting.

(a) For systems that don’t let files and groups be automatically compressed. Do what’s written below:

To start, go to File >> Offline >> Work Offline to switch to offline mode.
Now, go to File >> Compact Folders and manually shrink the folders in that account.

(b) It works differently in Thunderbird versions above and below 5 on computers that allow automatic folder compression. For each of these, the steps for compacting are shown below.

For Thunderbird versions less than 5:

Click on Tools, then Options, then Advanced, then Network & Disk Space. Space on the Hard Drive >> Folders that are small, when it saves more than 100 KB, press the OK button.

For Thunderbird versions 5 and up:

Click on Tools, then Options, then Advanced, then Network & Disk Space. Folders that are small, when it saves more than 10 MB
In addition to the steps above, you can also take a backup in a safer place by following these steps:

The person first clicks on Help >> Troubleshooting Information.
Show Folder to open the profile’s file manager on the machine.
The user can now quickly copy and paste the directory to a safe place.

(ii) The Software Method

A third-party tool is always the best way to back up and recover profile folders because it is easier and takes less time than doing it by hand. It will also fix the Thunderbird temporary writing file error in minutes. The MozBackup tool can be used to do this. It’s a tool for making a copy of your Mozilla Suite identity. Moving the profile files to a different system is very easy with this method.

iii) Alternative Method You Can Trust

It can be very helpful for people to use a third-party tool Thunderbird To PST Converter. First, users can move Thunderbird MBOX file to Outlook. Then, they can make a copy of the PST file and use that copy in Outlook. This way will save a lot of time and work, and it will let users back up their Thunderbird profiles in an Outlook environment.

Step 2: Make a subfolder:

In this step, the user needs to make a subfolder inside the Local files. After that, just move the emails in the “Sent Folder” to this new subfolder. The user needs to make sure that the backup has already been made.

Step 3: Getting rid of files:

Users must delete both the Sent.msf file and the file that was sent but doesn’t have an extension at this point. After that, start up Mozilla Thunderbird again. There is now a new folder called Sent that is empty. After that, copy any messages in the sent folder from the new folder that you made above. When you’re done copying, just pack the folders down.

This is the last step in the method. If users follow these steps, the “sending of message failed error writing temporary file” message will not show up again when they try to send emails.

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