It can be that Droppy is not able to upload your files completely, most of the time the cause of this issue is that you haven’t configured your PHP settings properly. To fix this you will need to have access to your PHP configuration file (Most of the time a php.ini file). To locate the location of your php.ini file you will need to upload the file (attached to this article) to your server using FTP or any other file manager. Then go to your browser and go to: http://yourdomain.com/phpinfo.php
When you’ve loaded the phpinfo file there will be a section called “Loaded Configuration File” this shows the path to your php.ini
Open the php.ini file from the path shown above.
For this "tutorial" we would like to upload a maximum file size of 3 GB and a maximum amount of 200 files in one upload.
So you would need to change the following values (in the php.ini file) to:
max_execution_time = 0
max_input_time = -1
max_file_uploads = 200
max_input_vars = 200
Sometimes you will need to restart your web service / server to apply these changes.
If these changes won’t solve your problem you should try contacting your hosting provider and ask them for any file upload limitations.