Always back up your current PSdZData folder before proceeding with an update.
The vehicle you are trying to connect to is running a newer I-Level firmware version than what v4.27.20 supports.
The Lite version (~400MB–800MB) is streamlined, containing only the data necessary for coding. The Full version (>20GB) is required only for flashing/programming (firmware updates).
A common error during installation involves extracting files directly into E-Sys subfolders, which can crash the application program directory. Follow this specific directory mapping structure instead: v42720 psdzdata lite download work
To successfully download and work with , you must ensure your software environment—specifically E-Sys —is compatible with this data version. This lite version is designed for coding (VO and FDL) rather than flashing firmware, as it lacks the bulky SWFL files found in the "Full" version. 1. Compatibility Check
This version contains everything in the Lite pack plus the massive firmware files used for reprogramming
When searching for data files, you will always be presented with two choices: or Lite . Always back up your current PSdZData folder before
Launch (via your preferred launcher or token master tool). Go to the Options menu and select Settings . Navigate to the Directories tab.
Open , go to Options > Settings > Program > Directories . Ensure the "Data Path" is correctly set to C:\Data . 💡 Lite vs. Full Version
Contains only the files necessary for coding (changing parameters/features). The Full version (>20GB) is required only for
Because these files are highly compressed, standard Windows extraction tools sometimes fail or corrupt the files during unzip operations. Always use the latest version of to extract the data to guarantee file integrity.
Unlike the massive "Full" version—which includes heavy SWFL firmware flashing files—the Lite version strips out the flashing data. This reduces the download size to roughly 2GB while keeping 100% of the core data required for routine coding functions.
Contains FLASH files needed to update ECU firmware (flashing).