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How to split files, cut large files into many small files

Splitting large files into smaller files is an effective way to get around the file size limitations of many different messaging and email services. You can split files on Windows and then reassemble them using these two popular file storage tools.

Split large files with WinRAR for easy sharing and storage

WinRAR is one of the most popular file compression and archiving tools that has the ability to split files into multiple files of the size you specify. Download WinRAR and install it on your computer.

Once installed, open File Explorer and right-click on the file you want to split. Then choose WinRAR > Add to archive.

File Explorer context menu with WinRAR archive option
File Explorer context menu with WinRAR archive option

The archive format is set to RAR by default, but you can choose ZIP or RAR4 if you want. Leave the compression method as Normal and the Dictionary size at the default settings because you are splitting the file.

In school Split to Volume, sizespecify the desired file size for each section. Suppose you have a 6.34GB file that you want to split into 1GB files. You can also add a password to protect your archive.

Once done, click OK. WinRAR will start dividing files into the specified size and saving them to the source folder. This process may take some time, depending on the file size, so wait until it completes. The shared repositories are named part1, part2, part3, etc.

WinRAR splits files in Windows File Explorer
WinRAR splits files in Windows File Explorer

You will need every part in the same folder to combine the files. Right click on the first part of the file and select WinRAR > Extract files. Select the destination and click OK.

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The recipient must have WinRAR installed on the Windows computer, as other archive tools or Windows 11's built-in extraction options will not be able to recombine the files.

Use 7-Zip to split large files into smaller files

7-Zip is another archiving and compression tool that can split large files into smaller parts. Free to use, open source and known for its high compression ratio.

Download 7-Zip and install. Once installed, launch 7-ZIP, double click Computer and select the file you want to split. Finally, click Add (green plus icon).

Alternatively, select and right-click the file in File Explorer then select Add to Archive.

In the window Add to Archiveclick Split to volumes, bytesthen enter the file size. For example, enter 20M will create files of size 20MB each file.

Additionally, use the encryption option to add a password to your vault. Leave the other options at their default settings and click OK.

Windows File Explorer with 7-Zip split files
Windows File Explorer with 7-Zip split files

Like WinRAR, you must use 7-Zip to recombine the parts. To do this, right-click on the first part of the file, then select Show More > 7-Zip > Extract Files. Select the destination folder and click OK to extract files.

By following these methods, you can split large files to overcome file size limits across storage devices, instant messaging applications, and email services. These instructions will work with any type of file, including video, audio, compressed archives, backups, and disk images.

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