I have a client who requires a file sharing solution. We've developed a Wordpress site for his surveying company. They produce very large scan/3d files for each client (think 10Gb - 50Gb) which some clients need access to download. These are stored locally on a NAS Raid system.

He'd like to be able to offer some clients a 'client remote login' on his WP website that, on entering their unique credentials, displays their client folder contents (from the NAS) in the browser and have their files/folder available for list/download.

We think we can provide access to the NAS via ftp protocol, so is there a WP plugin that provides an FTP client UI in the browser that we can use to connect to the NAS?

Or can anyone suggest a simpler/smarter solution to this conundrum?