Help with troublesome unpacking

[Blå_Mocka]

Have an archive thath fails to unzip for me..i however know it truly works
so im going throu my process-attempts from start to goal here, and if you then could shout if you locate the probably basic error im performing..it would be wery fun and appretiated

The instructions i got

696 MB zip file

"Download the three parts, join with HJSplitter
and unzip using WinZip"

File-Name.zip.001 type:7-Zip.001 (200 mb)

File-Name.zip.002 type:002-file (126 Mb)

File-Name.zip.003 type:001-file (200 mb)

HJ-split finds "File-Name.zip.001 type:7-Zip.001" in the folder and joins succesfully, the output i get from thath
is "File-Name.zip" type:Winzipfile (200 mb)
(clearley wrong, HJ-output should not be same size, no surprise you get message "not valid archive" if try to unzip it after)

The only real cause i can come up with myself is thath zip.001 have the extension 7-Zip instead of just Zip, it's true thath i have setted 7-Zip as primary unpacking soft for all archive..but even after uninstalling it (after failing to uncompress this file) and use Win-Zip as suggested here, the extension is still 7- before the Zip, and could it be thath 7 in 001 screw this whole up? on the other hand im unsure if the file creator accually used 7-Zip ore if its only my computer thaths refering to it..still 7-Zip should and use to works as well as Winzip on all files so it talks little against this theory?
another desperate theory signed myself= Zip.003 have _ _ in the filename, the other two parts use just letters? can it affect?..right! enough amateur detective work now, i handle this case over to you now, im pretty sure you solve this

regards/Blå Mocka

[guns1inger]

If you take the three files and add up the sizes you come up well short of the needed 696 MB, so it looks like you may be missing a part of the file.

Secondly, HJSplit obviously isn't joining anything if you are getting a 200MB and the first part is 200MB is size. For HJSplit to work, all three must have the same name up to the extension.

[Blå_Mocka]

For HJSplit to work, all three must have the same name up to the extension.

Thank you wery mutch 8) thath did the trick