SHARKK&reg; 5 in 1 Card Reader Connects Cameras, USB, & Memory Cards To Samsung Galaxy Tab 7.7, 8.9, 10.1 P7500 P7510 P7310 P7300 Brand new SHARKK 5 in 1 Samsung Galaxy Card Reader Support MS. SD. SDHC. MMC. MMC2. RS MMC. UITRA2 SD. EXTREME SD .. EXTREME 3 SD, TF (Micro-SD). Support usb hard disk (The hard disk must have external power) Make sure small Black Switch on side of reader is in correct position. Please email us with any questions.