Users often struggle with large MBOX files as it is difficult to maintain and transfer. Nowadays, users prefer to split large MBOX files into small separate files. There are various methods to split MBOX files into smaller files. So, in this article, we will put some light on how we can split MBOX into separate files with the manual as well as the automated approach. First, let’s start with the reasons why a user needs to split large MBOX files.

Reasons to Split Large MBOX Files:

• Large MBOX files can slow down email clients or can lead them to crash. Splitting of files helps in a fast loading time.

• Large files have a much higher risk of getting corrupted. Breaking it down minimises the risk.

• Small files are easier to restore and take a backup, as larger files take a lot of time to back up.

• It’s easier to maintain small files instead of a bunch of large files. Small files can be easily maintained by date, topic, sender, etc.

It is a free manual method to Split large MBOX files. Let’s see the working steps of this method: 

1. Download the Mozilla Thunderbird software and first go to Tools >> Add-ons and themes, and search ImportExportTools NG.

2. Then go to the Mail page and right-click on local folders, select ImportExportTools NG, and then click Import MBOX files >> Individual MBOX files.

3. Once imported, it will appear in the local folders, then you can select a batch of emails as per your requirements.

4. Then right click on your desired files, go to ImportExportTools NG >> Folder export (mbox), then select as MBOX files.

5. Lastly, name and save the file.

Why Should You Not Split MBOX into Separate Files via Thunderbird?

• No automatic splitting - Thunderbird doesn’t provide an option to split .mbox files. You will have to do it manually one by one based on your requirements, like splitting on the basis of date, range, year, etc.

• Time-consuming - If you have a large number of .mbox files with huge data, it will be a very difficult and time-consuming process to separate as per the requirements and then export and name them.

• Human errors - Without automation, there is no guarantee of perfection. Human errors can occur, like duplicating or missing files.

• No filters - There is no such filter to select files in an efficient manner, like selecting the first 500 files, choosing by date, year, or range, etc. Due to which it becomes impractical for very large folders.

• Performance issue - This software can lag, freeze, or crash while splitting such a large number of files, especially on devices with limited RAM.

How to Split MBOX into Separate Files by Using an Expert Tool?

If you are seeking the best and easiest solution to Split MBOX files into smaller files. Then you can prefer MBOX Splitter Software by SysTools. This utility saves time and offers filters to organise large MBOX files separately. It supports splitting large files from different email clients, like Thunderbird,  Eudora, SeaMonkey, and many more. Let’s have a look at 5 easy steps to split large MBOX files by using our automated wizard.

1. Install the software and open the user interface.

2. Firstly, click on Add file.

3. Select your MBOX files, add them, and click on Next.

4. Then choose your desired splitting options and destination of the files, and hit the split button.

5. Lastly, the process has been completed successfully and will appear on your interface.
   

Conclusion:

We have seen so far that using manual methods to split MBOX into separate files is not easy or convenient. Using an automated MBOX splitter tool saves your time, organizes your files like a professional, and speeds up your work. Try this software to split your large MBOX files easily with Sys tools.