Have you run out of SD space yet? I have lots of music and apps installed. It took no time to fill up my 8 GB card. Sure, I can buy a bigger card for $$. But, I have extra 8 GB cards that I'd like to swap out on an as-needed basis. With the EVO, I have to power down, remove the battery, swap cards, and power back up. This is PITA! The Epic has an external SD door where you can swap out SD cards without powering down. I hate sliders, but the accessible SD is very nice.