USB devices

i have 2 external seagate HD on usb setup. they show up on “my computer” but when trying nto access them i get no response. what am i doing wrong?

thanks

How about letting us have some more info:

What make of HD, what format (ntfs, FAT32, ext3)?

In a terminal go su:

fdisk -l

paste here

can you see the devices in: /media