OK let's separate the Digital Flight Data Acquisition Unit, data that is recorded on a PCIMIA card that provides more or less just a snapshot of data. The SSDFR that data is protected in and can be downloaded by a AVIONICA RSU or RSUII, usually a file 10-35 MB in size. A CVR or more commonly combined CVR/SSDFR (SS= solid state) that is usually the box removed from an aircraft and quarantined when the CAA gets involved and normally is only able to be interrogated by the CAA.
Sometimes EG after a suspected hard landing, company will request the SSFDR to be removed from the aircraft and read out directly on a bench.
Back on ACMS, we have mandatory, non mandatory and customer specific parameters, this software is loaded into the DFDAU to match the sensors measuring required inputs and outputs as well as elected ones that are installed on an aircraft. ACMS data can usually be monitored as (ALPHA Callups) from a CDU in the cockpit. If you know what your Alpha or Alpha numeric designator is for the parameter you wish to monitor it is the easy way of seeing what the sensor is reporting.
The uQAR intercepts and copies the data as it travels from the DFDAU to the DFDR.
The mini QAR (usually an AVIONICA device) is more for reporting engine health, on off in for flight time/delay tracking and crew pay.