Reference: Basic Report Organization Options

Field Description
Client Address Organize / summarize report by Client IP Address (client = initiator of the transfer)
Contact Organize by the 'Contact' shown for a transfer. This might be a Console user name, a Faspex Server user name, SSH account, or customized value obtained from a transfer cookie. Examples: "admin (console)", "aspera (ssh)", "aspera (faspex)".
File Display a detail row for every file in every transfer.
File Extension Organize / summarize report by file extension.
Server Address Organize / summarize report by Server IP Address.
Session Display a row for every transfer session. A transfer session represents one attempt to transfer.
Transfer Display a row for every transfer. A transfer may have multiple sessions if it took multiple attempts to finish.