Help for a friend of mine

Hey, my friend recently installed Rph on his new pc but every time he load in it lags horribly, and sometimes it crashes, he said it says it is installing game data, any fixes?

Is his data file about 52~GB large? If not, then he should probably just leave the client open and let it download.

Keeps crashing and returning me to the login screen whenever I do log in on a char, does game data download in the char select screen?