You need a SD Card to use 3D printers. Be careful that the max. size of a SD Card should be less than 2GB. (3D Printers cannot read SD Cards larger than 2GB).
Radioshack does not carry a 2GB SD card anymore. (Thanks to Erron and Clarrise)
you can order one from Amazon.
We don’t recommend to use USB cables that frequently stop printing due to communication errors and computers’ power setting.