DKmagic 4GB USB 2.0 Metal Flash Memory Stick Storage Thumb U Disk Gold Compatible with USB 2.0 Speed: Writing Average 10-12MB/Sec. Speed: Reading Average 3-5MB/Sec Effect of U disk read and write speed will be affected by temperature and transport Speeds of up to for handling your large photos, videos, or other files in a fraction of the time Supports Windows 7 / 8 / 98 / Me / 2000 / XP / Vista / Linux 2.4, Mac OS 9.0 And above Etc Computer operating systems