The information is given in the following table.
Type Location
User Profile Pictures <root>\images\jblance
Project NDA Agreements <root>\images\jblance\bids
Custom Field Attachments <root>\images\jblance\custom
Private Messages <root>\images\jblance\message
User Portfolio <root>\images\jblance\portfolio
Project Attachments <root>\images\jblance\project
