This is something so simple that I cannot believe it’s not a part of Android by default. Here’s the deal, mounting your SD card, connecting to your computer, etc is just so 2007. If you have a rooted Android phone (shouldn’t ALL Android phones be rooted?), then you really wanna check out Samba Filesharing.
Whether you’re out and about and you’ve forgotten your USB cord or you just don’t want to be tied down by physical cables, Samba Filesharing is a ridiculously easy way to access your phone’s SD card from a computer. Again, you have to have root access to your phone but if you do simply download the app and type \\ANDROID into Windows Explorer, type in the username and password and bam… browse your SD Card and copy files to/from it just like any other network share.