Create a folder from Servlet and save file

In my form, user uploads a photo(s) and then I want to store that photo in a network disk (in our local network).

The following works fine, when I execute it from Netbeans in my PC:

public void saveFiles(List<Part> fileParts,String targetId) {
String pathRoot = "A:\ShareDisk1\Photos\";
String date = new SimpleDateFormat("yyyyMMddHHmmss").format(Calendar.getInstance().getTime());
try {
int counter = 1;
for (Part filePart : fileParts) {

String destPath = pathRoot + "\" + targetId;
Boolean flag = new File(destPath).mkdirs();
System.out.println("flag = " + flag);
File file = new File(destPath, targetId + " " + date + "-" + counter + ".jpg");

try (InputStream input = filePart.getInputStream()) {
Files.copy(input, file.toPath());
}

counter++;
}
} catch (IOException ex) {
ex.printStackTrace();
}
}


However, when I deploy the app in my Tomcat Server it doesn't work and I get a java.nio.file.NoSuchFileException exception:

java.nio.file.NoSuchFileException

java.nio.file.NoSuchFileException: A:ShareDisk1PhotosMachine 4Machine 4 20180702122146-1.jpg
at sun.nio.fs.WindowsException.translateToIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source)
at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(Unknown Source)
at java.nio.file.spi.FileSystemProvider.newOutputStream(Unknown Source)
at java.nio.file.Files.newOutputStream(Unknown Source)
at java.nio.file.Files.copy(Unknown Source)


The path of the folder doesn't exist so I try to create it with

Boolean flag = new File(destPath).mkdirs();


which returns false. Reading the documentation:

false

Returns: true if and only if the directory was created, along with all
necessary parent directories; false otherwise

So, (if I understand the above info well) if the directory already exists, it will return false. However, in my case the directory doesn't exist, so the false what does mean?

false

In the Server (Windows Server 2008 R2) where the app is deployed, I have mapped the network disk in the letter A:. I tried also and created the folder by myself, to see if the folder exists what will happen but I still get the same error..

A:

Also, I check the JAVA version is the same in my PC and the server build 1.8.0_171.

JAVA

1.8.0_171

Edit 1

I tried also setting in web.xml the :

web.xml

<context-param>
<param-name>upload.location</param-name>
<param-value>A:ShareDisk1Photos</param-value>
</context-param>


And then using this:

String destPath = getServletContext().getInitParameter("upload.location") + "\" + targetId;


but I get the same result. When executing the app in Netbeans, I don't have any error, but when I deploy the app I submit the form I get the above error.

Edit 2

I tried to save the file in the local disk but I still get the same error. So the problem isn't the path of network location...

Edit 3

A quick recap: The above method works successfully when I run the webApp through NetBeans in my PC. However, when I deploy the webApp in a Windows Server PC (this is another PC, where TomCat Server runs as Windows Service) the above method throws the java.nio.file.NoSuchFileException` exception.

Windows Server

TomCat Server

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