Probably you will have received a set of files that are separated/split (like when you have multiple volumes in a ZIP or RAR file) but that have not been generated through a compression tool.
In those cases, usually the sender recommends to use HJSplit to join those files.
Here you will find a simple batch file sample on how to do that without any program. Simply form the CMD.
Using the Code
As you will see, this is only a special syntax for the copy command in Windows.
In that case, you will take advantage of the
/B modifier which indicates copy that the file is binary.
Also, you will use the
+ sign to join files:
copy filename.iso.001 /B + filename.iso.002 /B filename.iso /B
After executing the previous snippet, you'll get a new file named "filename.iso" which will be the addition of two binary files filename.iso.001 and filename.iso.002.