How to resolve my error when uploading files? In our Drupal site when we try to upload .zip file having 210MB size, we are getting an error saying:

The file NewEdition105.zip could not be saved. An unknown error has occurred.
The file in the Sai Rel File field was unable to be uploaded.

If I try with a 100mb .zip file I am able to upload. My maximum upload file size is 1800MB, upload_max_filesize=1600MB and post_max_size=1600 MB.
Did anybody face a situation like this? Any solution for this?
You can try the Pack &amp; Upload module for this. This module can be used to upload the zip file.