One of the great things about SanDisk’s line of Sansa MP3 players it the microSD card slot. All of them have this feature except for the Sansa Clip. This means you can double, sometimes triple the capacity of the player relatively cheap. The microSD slot is a great future proofing or rather life extending feature on an MP3 player.
While SanDisk Sansa players lead the industry in upgradable and removable storage there are a few others that contain that will be able to take advantage of this microSD card. These players include the Insignias, the Cowon D2, Creative Zen, and some of the newer irivers like the E100 and the Spinn.
The big feature of this card is the increased speed. I ran a few benchmark tests using the supplied micro adapter and found it to have a transfer rate of about 18-20mbps. This was about a 100% increase from SanDisk’s previous non “Ultra Moble” microSD cards. In terms of using this with your MP3 player, you will save a few min filling an entire card. I tested it on my Treo 750 as well and it was noticeably faster running applications directly from the card.
The Ultra Mobile retails for $35, $60, & $120 in 2GB, 4GB, and 8GB respectively. However if the speed is not that important, SanDisk’s other standard microSD cards sell for about half on Amazon.