We’ve received numerous questions around what .001 files are and how to use them. 001 files are the format for split files. .001 files are usually numbered as .001, .002, .003, etc. They are not compressed and contain separate components of a file. In order for a .001 file to work, it must be “joined” back together. Many times .001 files will be joined to create an ISO or a Bin File.
Instead of using a program like WinRAR or 7Zip to compress and break apart files, the .001 split format is just a file that has been divided into several parts for easier posting. Most of the articles or binary files that you download from binary newsgroups will be in a RAR format such as filename.part01.rar, filename.part02, etc. These files can be extracted-put back together into its original state by an UNRAR’ing program . In most cases, .001 files cannot be put back together by UnRAR programs.
UnRAR/Extraction programs like Winrar do not extract the .001 split files because the files were never compressed. They are usually split apart by a file splitting program such as hjsplit or 001filejoinerspliter.
How to Open .001 Files
The file part that ends with the 001 file extension contains the data that will open and join the rest of the .00X extensions together. Most of the programs should find the rest of the .001 parts (.002, .003, etc.) if they are in the same containing folder.
How to extract or join a .001 file with 7Zip
Many folks try to open .001 files with WinRAR . More often than not, Winrar will not extract or join 001 files. However, 7-Zip is a powerful unraring tool that is able to join .001 files together.
Joining .001 files with 7Zip is very simple. First you need to make sure you have 7Zip installed. You can learn how to install and configure 7 Zip here. Once you have 7Zip installed, find the .001 file set that you would like to join. Make sure the rest of the 001 file set is in the same containing folder.
You can right click the .001 file to bring up the right click menu.
A – select 7Zip from the menu. This will bring up another menu with more options.
A – Select “Extract Files” Doing so will bring up another Window.
A – Decide where you would like to extract the .001 file and click OK. It should default as the same folder containing the .001 file set. After you click OK, it will bring up a status window.
The status window will show you how much of the .001 extraction process is complete. Once 7zip is finished, it will dump the .001 file set into the same containing folder unless specified otherwise.
Then use appropriate program to open the file.
Visit our Usenet tutorial section to learn more.