Hi Ayitharaju Prasanna vani
You don’t want to add multiple file manager to upload multiple documents. We can use the file dropper widget to upload multiple files.
Check this link : https://marketplace.mendix.com/link/component/111497
I hope it helps
this one? https://marketplace.mendix.com/link/component/111497
Check the ‘Documentation’ tab, where you will find setup instructions
File droper (marketplace) or file manager (standard in studio). Don't forget to set the correct association between the file entity and your other entity 😉
By using file dropper you can able to include multiple files to upload.