A proxy server comprising one or more processors operable to: establish communication with a secure client application of a device, the secure client application comprising a partition configured to contain data received from the proxy server within the secure client application; receive an authentication request from the secure client application, the authentication request comprising authentication information associated with a user account; determine that the secure client application passes authentication; receive one or more files associated with the user account, the files received from a business server in a raw data format of a raw data-specific application; determine preview information for the one or more files; communicate the preview information to the secure client application; receive a request from the secure client application requesting a first selected file, the first selected file corresponding to one of the files of the preview information; render and/or divide the first selected file into a first portion and a second portion based on an approximated amount of data that the secure client application may display at one time to determine how much data to include in a particular portion; communicate the first portion of the first selected file to the secure client application; determine, using at least one of the processors, that a trigger point positioned within the first portion of the file was reached, wherein the proxy server is configured to facilitate communicating the second portion of the first selected file in advance so that the second portion of the file is available when the user wants it; and communicate the second portion of the first selected file to the secure client application in response to determining that the trigger point was reached, determine that a completion event occurred, the completion event comprising a prediction that a user has completed viewing of the first selected file, and instruct the secure client application to delete the first portion and the second portion of the first selected file from the secure client application. establish communication with a secure client application of a device, the secure client application comprising a partition configured to contain data received from the proxy server within the secure client application; receive an authentication request from the secure client application, the authentication request comprising authentication information associated with a user account; determine that the secure client application passes authentication; receive one or more files associated with the user account, the files received from a business server in a raw data format of a raw data-specific application; determine preview information for the one or more files; communicate the preview information to the secure client application; receive a request from the secure client application requesting a first selected file, the first selected file corresponding to one of the files of the preview information; render and/or divide the first selected file into a first portion and a second portion based on an approximated amount of data that the secure client application may display at one time to determine how much data to include in a particular portion; communicate the first portion of the first selected file to the secure client application; determine, using at least one of the processors, that a trigger point positioned within the first portion of the file was reached, wherein the proxy server is configured to facilitate communicating the second portion of the first selected file in advance so that the second portion of the file is available when the user wants it; and communicate the second portion of the first selected file to the secure client application in response to determining that the trigger point was reached, determine that a completion event occurred, the completion event comprising a prediction that a user has completed viewing of the first selected file, and instruct the secure client application to delete the first portion and the second portion of the first selected file from the secure client application.