How do I reassemble a zip file that has been emailed in multiple parts?

Question

I received 3 emails each containing part of a zip file. The extensions end in .z00, .z01 and .z02. (Emailed as such to get around the typical 10Mb attachment limit per email.)

I have put all 3 files into one directory.

I can use both 7-zip and WinZip to open the first file (the .z00 file) and it lists the contents of the zip but when trying to extract the files both programs are reporting errors.

What is the least error prone way of reassembling this zip and getting to the files?

therefromhere · Accepted Answer · 2014-11-04T08:21:37.170

It's fairly safe to assume that the file parts just need to be concatenated together.

The easiest way to do this is within 7-Zip - navigate to the folder in the 7-Zip file manager, right-click on the first file in the sequence, and select "Combine Files..." from the context menu.

It can also be easily done on the command line.

On Windows:

copy /B input.z* output.zip

Or Linux (or if you've got Unix command line tools on Windows using Cygwin or GnuWin32):

cat input.z* > output.zip

score 10 · Answer 2 · edited Mar 20 '17 at 10:17

10

Usually there is one *.zip in the set and a couple of *.z??. If you open the *.zip the others are unziped as well as long as they are in the same directory.

If this does not work try what therefromhere said, or if you are on windows:

copy /B yourfile.z00 + yourfile.z01 + yourfile.z02 yourfile.zip

edited Mar 20 '17 at 10:17

Community

1

answered Jul 30 '09 at 19:07

Ludwig Weinzierl

8,083

score 6 · Answer 3 · edited Nov 17 '20 at 18:25

6

Have you tried to unzip all the files? Usually, one have to unzip just one (the first or the last). Maybe, if you change the extesion of the .z00 to .zip, will be able to unzip all.

edited Nov 17 '20 at 18:25

serghei

145

answered Jul 30 '09 at 19:06

Leonel Martins

276

score 5 · Answer 4 · answered Jul 30 '09 at 19:07

5

Usually when i receive split files , i unzip the first file only.
Doing so gave me the complete file, I used 7-zip

answered Jul 30 '09 at 19:07

Rishi

926

score 3 · Answer 5 · edited Feb 05 '14 at 09:45

3

I had difficulty with two files I received as xx.zip and xx.z01. I simply did:

cat xx.01 xx.zip > yy.zip

followed by

unzip yy.zip

Gave a few warnings, but did the job. This was on Ubuntu Precise.

edited Feb 05 '14 at 09:45

slhck

235,242

answered Feb 05 '14 at 07:46

Ravi

41

score 1 · Answer 6 · answered Jul 30 '09 at 19:03

1

My guess is that they were just split directly, with no extra information, so you should be able to just concatenate them and end up with a full zip file. This thread has some links to tools that can concatenate files.

answered Jul 30 '09 at 19:03

jtbandes

8,960

score 0 · Answer 7 · edited Jun 27 '17 at 02:57

0

Solution Using 7z

Open the folder where the split folders are stored. In my case they were 16 files named from *.7z.001 to *.7z.016
Right-click on the first of the folders and left click to select the "Extract To" suggested folder name proposed automatically by 7z.
7z then creates a new uncompressed folder inside the same folder and starts unzipping and combining all of them.

edited Jun 27 '17 at 02:57

Stephen Rauch

3,296

answered Jun 27 '17 at 00:35

Luis F. Garcia

1

score 0 · Answer 8 · answered Aug 02 '18 at 15:02

0

I created a new folder, drag the split files into that folder. Highlight all files, select Extract. This will create a new sup-folder where your combined files will be located. Used 7-zip.

answered Aug 02 '18 at 15:02

Tom Pope

1

score 0 · Answer 9 · answered Sep 21 '23 at 16:52

The problem you're describing seems rather unique, and could maybe be a problem about how the files where packed / the zips themselves.

In my case (2023), everything worked like a charm - although I didn't have any 00 file.

My first file was 001 and I extracted that like I normally do with 7zip as well (for example.zip "extract to example/") - this extracted all files into the ["example/"] directory.

This is not a new zip file of course, if you wanted that, although i guess your problem is long solved ;)

score -1 · Answer 10 · answered Sep 12 '13 at 01:40

-1

Open your 7-zip file manager and and navigate to where the parts are, you can then highlight, right click and extract here or wherever you want the end file to be located.

answered Sep 12 '13 at 01:40

Josh

1

score -2 · Answer 11 · answered Aug 09 '13 at 05:43

-2

Plain combining 2 individual archives into one will not work. In fact I just tried that on zip, bzip2 and xz archives. All reported the outcome archive to be invalid. It might work with proper multi-part archives though.

answered Aug 09 '13 at 05:43

Stabby

1

How do I reassemble a zip file that has been emailed in multiple parts?

11 Answers11

My first file was 001 and I extracted that like I normally do with 7zip as well (for example.zip "extract to example/") - this extracted all files into the ["example/"] directory.

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