A Bit through Project Cars but ,

[ApexDrift123]

Im a bit through it but if i creat a PSN account will i lose all my game data for the game ?

Or if i rename " User1 " default name will i lose it too ?

 

[crowhop]

No idea how pCARS might work on PS4, but what you would like to do would not work for GT5/6 and the PS3.
For GT, the saves are tied to the PSN and are non-transferable.