You can download and use bandwidth monitoring tools, eg DU Meter http://www.hageltech.com/dumeter/download
Each FTP server maintained by an Administrator, if it is not Free FTP server you have to contact with the Admin to get access.
Any kind of query you can reach us to mail : firstname.lastname@example.org
Over phone support 24/7 only.
FTP Server is File Transfer Protocol Server, where authorized user can upload, download and share any file.