Assigned slots for CF Type I & II (UDMA), SD (all classes), microSD, Memory Stick, MicroDrive, MMC and more allow this transfer unit to respond to virtually any storage device. Plus, all slots can be accessed concurrently for efficient card to card transfer. When utilizing the many advantages of a USB3.0 port, transfer speeds reach a theoretical rate of 5Gbps. However, this device is also backwards compatible with USB2.0 and 1.1 at slower rates. Proficient SDXC capabilities drastically lessen input & output time with your large capacity memory card, especially apparent when relocating high-res images and HD & 3D video. Convenient installation entails simply inserting labeled plugs on the included USB cable into their respective ports on your PC and rear connector of the reader. With the insertion of your memory card, an LED will remain illuminated and blink repeatedly when a transfer is in process. This indicates that a read/write operation is taking place and disconnection may cause data loss or damage to the card. Backed by our US-based customer support staff and five year warranty.