I preformed

useradd -m -d /location/of/ftp/folder ftp 

then 

passwd ftp 

to set the password. 

 

However when I log into the FPT server the user can see and access my entire array. 

Where do I restrict this access?

If you turn on Unraid help, you will see this:

 

Quote

 

Overview

Unraid includes the popular vsftpd FTP server. The configuration of vsftp is currently very simple: All user names entered above are permitted to access the server via FTP and will have full read/write/delete access to the entire server, so use with caution.

 

If look at the Apps page, you can find many options that have ftp as the search string.

Meh, I'm just going to share it out via my nextcloud. 

Thanks.