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I use 7-zip to create several archives with fixed size (512 Mb) from one big file. They have this structure:

my_name.zip.001
my_name.zip.002
...
my_name.zip.005

My problem is that without 7-zip I can't open them, is it possible by just using Windows 7 default tools?

Luc
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mrgloom
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  • If you only don't want to install the gui you can use the commandline version (http://www.7-zip.org/download.html) or google for "7zip portable version" – marsh-wiggle Jun 29 '16 at 08:59

2 Answers2

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On Windows 7:

  1. Open the folder your split zip file is in
  2. Shift + Right-click
  3. "Open command prompt here"
  4. Type copy my_name.zip.* my_name.zip /b /v /y and press Enter
  5. Open your zip normally

This is beacuse 7-Zip doesn't split zip files according to the ZIP specification, but simply splits the binary file into smaller files, just like the GNU/Linux command split. xcopy stuff.* stuff will convert all the stuff.001, stuff.002... back into the original file.

Nathan.Eilisha Shiraini
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  • `several archives with fixed size (512 Mb) from from one big file` My experience at Windows 7 is, that the on board unzipper runs in ressource problems or internal errors with such big files. – marsh-wiggle Jun 29 '16 at 11:14
  • Did you try it? It just copy all my_name.zip.00X to the same my_name.zip file (rewriting). – mrgloom Jun 29 '16 at 12:08
  • My bad, I gave you the wrong command. You should use `copy` instead of `xcopy`. – Nathan.Eilisha Shiraini Jun 29 '16 at 12:35
  • Still not working. – mrgloom Jun 29 '16 at 12:51
  • Well now you surpirse me. Try adding `/b /v /y` after the command, to tell Windows you're using a binary file. If I remember correctly these are the switches I use when joining together archive files splitted with GNU-split. – Nathan.Eilisha Shiraini Jun 29 '16 at 13:01
  • And I am sure 7-zip uses GNU-split style to make multifile ZIPs, because I found that on their official website when I tried opening a multifile ZIP made with Linux `zip` command. – Nathan.Eilisha Shiraini Jun 29 '16 at 13:02
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    In windows 10 at least the command needs to be slightly different. The parameters need to be IN FRONT of the source. Thus copy /b /v /y my_name.zip.* my_name.zip – Thomas May 08 '19 at 12:08
  • not working for me on windows 10. the copy works, but windows won't extract the files. I'm trying to get the 7z portables onto this overly-protected machine. – Daniel Williams Dec 14 '21 at 16:20
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Sure!

Windows has a default zip uncompresser. Just right click on the file and unzip. But if this doesn't work, you can always download Winrar. The procces is the same, right click on the file and click on the unzip option with winrar logo

kek
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