which one is better sd or ide

[aykiri1]

Hi all

i have moded HDD (now ide but will be sata)
when i want to load games with iso loader crashing or clack screen..

iso loader settings what i must select ? emulation ,memory adress,IP.BIN, etc...
i need a guide for that
example: 18 wheller game is working . i saw settings from aldair's video
neogeo emulator not working (but cd version is working)

which extention is better one (iso,gdi or cdi) and must convert to each other ?
i converted some games from mega pack
b.r