Can files sent by FTP be automatically visible

Hi there.

For my work, I complete reports that are converted to pdf files and then are sent automatically by ftp to a folder on my websites(wordpress) web server. I have a password protected page that allows viewing/downloading of the files that are stored in that folder. I currently use a plugin called 'simple file list' which does what I require but not for multiple clients and multiple access controls over folders and files.
For example - I use an app on my phone to complete a report and the pdf file of that report is sent via ftp straight to the clients folder on the webserver. The file is immediately visible to the client when they access the page on my website. This is done without me having to do anything else.

I like the functionality of your plugin but I need to know one thing before purchasing. Can it work the same as the process/workflow above? Once I set up folder permissions to give certain clients access to certain folders, if files are sent by ftp to those specific folders, will the files be automatically visible or do they need to be 'imported' or have anything else done?

I appreciate your response. Thanks.
Geoff