Litop 8GB Knife Shape USB 2.0 Memory Disk U Disk USB Flash Drive for Transfer Data with 1 Free Wrist Straps and 1 Free Necklace Straps (Silver Color with Red, 8GB) Store and save all your photographs, videos, movies and music via any USB 2.0 port Fashionable knife shape style, the USB flash drive made of high quality materials Easy to use, just plug in and play directly, no need any extra power supply Operating system supports windows 7 /8, Vista/XP/2000/ME/98/910, Mac OS 8.6 above and Linux, etc. High speed in writing /reading transfer, 100% quality guarantee