I/O DEVICE ERROR

I/0 error, IS AN INPUT/OUTPUT ERROR. this device is formatted as FAT32 as it is usable on all OS. however if you formatt it to the faster, safer NTFS format, it will only work on 2000, XP etc. so firstly is the device being "seen" by windows? as in does the plug and play connect device sound play? or the green arrow and card icon appera in the bottom left corner? if it doesnt your computer may not have a mass storage device installed, or a driver for it, go into your device managment and click rescan plug and play and if nothing comes up click, view hidden devices, and select the correct driver, by either manually selecting the mass storage or Hdd driver or letting windows find one on the net or locally. if this still doesnt fix things, be aware that external HDD us ealot of power, and some USB ports dont give enough power for the HDD to wind up enough speed to operate. try using a different port, 2.0 not 1.0 as i have found power draw issues with 1.0 USB and/or get a shorter, foot long or less cable.
good luck.