i really really really hate roxio media manager. i had micro sd card reader when i had my last phone so i have been using that. i find i get a ton less errors using the little reader then when i use roxio or even when using mass media support on a mac.
for as cheap as they are i really can say enough to praise em Newegg.com - IOGEAR GFR201TF USB 2.0 Pocket Card Reader for microSD / TF Cards - Card Readers
this is the EXACT model i managed to find at best buy, the only issue ive had with it is that there was no vista support, but that may have changed since i tried it last