The save data for Gran Turismo 6 on the PS3 is stored in a proprietary format, specific to the game's engine and the console's architecture. The data is saved in a series of files with a .gt6 extension, which are encrypted and compressed to reduce storage requirements. Upon inspection, the save data appears to be divided into several sections, including:

Last updated: 2026 – based on final firmware (4.89) and GT6 v1.22 (last patch).

GT6 requires a significant amount of storage space (ranging from 15GB to 50GB depending on updates). This contains the car models, tracks, and textures.