SSD, but 10X sounds conservative. SD card typically ready somewhere in the 10-15mb/sec range, 20-30 if you're lucky. A SATAIII SSD can hit 500mb/sec.

How can SD cards be faster than SSDs? SD cards - postage stamp sized flash cards in your camera - have no internal cache, little internal bandwidth, tiny CPUs, and slow I/O busses.

As for what to get, if your old SD card is fast enough, a larger SD card will also be fast enough. An ExpressCard SSD using the PCIe interface is going to be considerably more expensive.

SanDisk recently announced a 32GB SD card (pictured) at PMA08 that will retail for US$349 in April. That's a lot of meggers (as an old client used to say) in a tiny little chip.

But when that SD card is permanently tied to your MacBook’s SSD, and might hold crucial system files, you’re not going to want to pop it out.

To be clear, these are a lot faster than MicroSD but are still close to the larger SD cards, which top out at 3,940 MB/s.

4月21日消息，威刚近日正式推出了全球首款符合SD Express 8.0标准的高端存储卡，产品命名为“Premier Extreme SD 8.0 Express”。这款新品在性能上实现了 ...