Check the listing for details. Imation SD-USB-M External SuperDisk - UNTESTED. Condition: Used. Listed at 20.00 USD. The Imation SD-USB-M External SuperDisk is an external drive specifically made for use with Mac computers. With its USB interface, it allows for easy connectivity and data transfer. This product is ideal for those looking to expand their storage capabilities or access data on their Mac system. The Imation brand is known for producing reliable storage solutions, making this external drive a promising choice for users in need of additional storage space.