Originally Posted by Seņor_Striatum
I have a LaCie 2tb External with 1.5tb Fat 32 partition and I do not have lag problems. I always recommend LaCie because everyone I know who has one abuses the hell out of them and they continue to perform plus they look nice which is an added bonus. I use the following: http://www.amazon.com/LaCie-External...9582384&sr=8-3
The only instance in which I imagine lag becomes an issue is when using an external that does not have it's own power supply. I imagine the additional strain on the PS3 to power the external can cause lag.
You can fix the power lags with the 2USB ports, That's been working with me.