7Z.001 File Extension

What is 7Z.001 file?

Files with .7Z.001 extension store the first part of a split archive created using 7-Zip archiver. Full filename typically consists of the name of the original file and 7Z.001 suffix. 7Z.001 file is the first part of a split archive divided into subsequently numbered parts with appropriate suffixes. Such archive can store any type of data, but the compression method may not be optimal for some types of data.

Creating and extracting a split archive

Archive file-parts store information about the part files that are needed to extract given archive. If one of the parts is not present, extracting the archive is not possible. Part files must be placed in the same folder before extraction. Split archives can be created using 7-Zip or other file archiving tools that support such format. Split-archiving is used for large files, when sending files in email attachments, or when only limited storage space is available.

7-Zip file format

7z.001 file is a part of larger file archive. 7Z format was developed in 1999 for 7-Zip, a software developed by Igor Pavlov as an efficient, open-source data compression method. 7Z support the following compression algorithms:

• LZMA (default algorithm),
• PPMD,
• BCJ and BCJ2,
• BZip2,
• Deflate

The format also supports encryption and additional compression options. Archive headers can also be compressed and encrypted. 7Z however does not offer an data recovery feature, therefore it is impossible to recover missing or corrupted data automatically with 7-zip.

Programs which support 7Z.001 file extension

Below you will find an index of software programs that can be used to open 7Z.001 files divided into 2 categories according to system platform supported. 7Z.001 files can be encountered on all system platforms, including mobile, yet there is no guarantee each will properly support such files.

Updated: 06/16/2022

How to open file with 7Z.001 extension?

Being unable to open files with 7Z.001 extension can be have various origins. On the bright side, the most encountered issues pertaining to 7-Zip Split Archive Part 1 Format files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. We have prepared a listing of which will help you resolve your problems with 7Z.001 files.

Step 1. Download and install 7-Zip

Problems with opening and working with 7Z.001 files are most probably having to do with no proper software compatible with 7Z.001 files being present on your machine. This one is an easy one. Select 7-Zip or one of the recommended programs (for example, StuffIt Deluxe) and download it from appropriate source and install on your system. Above you will find a complete listing of programs that support 7Z.001 files, classified according to system platforms for which they are available. The safest method of downloading 7-Zip installed is by going to developer’s website (Igor Pavlov) and downloading the software using provided links.

Step 2. Verify the you have the latest version of 7-Zip

You still cannot access 7Z.001 files although 7-Zip is installed on your system? Make sure that the software is up to date. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. The reason that 7-Zip cannot handle files with 7Z.001 may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using 7-Zip.

Step 3. Set the default application to open 7Z.001 files to 7-Zip

After installing 7-Zip (the most recent version) make sure that it is set as the default application to open 7Z.001 files. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Change the default application in Windows

• Choose the Open with entry from the file menu accessed by right-mouse clicking on the 7Z.001 file
• Click Choose another app and then select More apps option
• The last step is to select Look for another app on this PC option supply the directory path to the folder where 7-Zip is installed. Now all that is left is to confirm your choice by selecting Always use this app to open 7Z.001 files and clicking OK.

Change the default application in Mac OS

• Right-click the 7Z.001 file and select Information
• Open the Open with section by clicking its name
• From the list choose the appropriate program and confirm by clicking Change for all....
• If you followed the previous steps a message should appear: This change will be applied to all files with 7Z.001 extension. Next, click the Continue button to finalize the process.

Step 4. Check the 7Z.001 for errors

You closely followed the steps listed in points 1-3, but the problem is still present? You should check whether the file is a proper 7Z.001 file. Being unable to access the file can be related to various issues.

1. The 7Z.001 may be infected with malware – make sure to scan it with an antivirus tool.

If the file is infected, the malware that resides in the 7Z.001 file hinders attempts to open it. It is advised to scan the system for viruses and malware as soon as possible or use an online antivirus scanner. 7Z.001 file is infected with malware? Follow the steps suggested by your antivirus software.

2. Verify that the 7Z.001 file’s structure is intact

If the 7Z.001 file was sent to you by someone else, ask this person to resend the file to you. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with 7Z.001 extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Check if the user that you are logged as has administrative privileges.

Some files require elevated access rights to open them. Switch to an account that has required privileges and try opening the 7-Zip Split Archive Part 1 Format file again.

4. Check whether your system can handle 7-Zip

If the system is under havy load, it may not be able to handle the program that you use to open files with 7Z.001 extension. In this case close the other applications.

5. Ensure that you have the latest drivers and system updates and patches installed

Latest versions of programs and drivers may help you solve problems with 7-Zip Split Archive Part 1 Format files and ensure security of your device and operating system. It is possible that one of the available system or driver updates may solve the problems with 7Z.001 files affecting older versions of given software.

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