2TB is the maximum size of SATA hard drive supported in R300. Below are the part# of the same
6C10R - HD,2T,ES,7.2K,3.5,H-JK,E/C
0H6GP - HD,2T,ES,7.2K,3.5,H-JK,E/C
0382H - HD,2T,ES,7.2K,3.5,H-MKP,E/C
9CF6R - HD,2T,ES,7.2K,3.5,H-JK,E/C
Thanks,
DELL-Shine K
#IWork4Dell