Costco has tempting prices on the SanDisk line of memory cards – Compact Flash, Smart Media, Memory Stick. I’m all set up with USB 2.0 ports and a USB 2.0 card reader, and I couldn’t figure out why it was taking so long to copy mp3 files to my card. Turns out there’s differences between the different brands – and the SanDisk are dog slow, as much as twice as slow to write files. It might not make a big difference to many of you, but if you’re shopping for memory for your mp3 player or handheld or camera, you might want to grab something else at CompUSA.