Thanks to both of you.
Well, I've learned the hard way not to use the hub for data, so I'll keep data transfer off the hub.
Currently, I just have the one computer, and of course I know it does need to be upgraded, and that will happen in the next few months.
The reason I use a hub is because I have only (2) USB ports on the computer and a mouse, keyboard, two printers, DSL modem, SanDisk, zen vision, and external HD to hook up to it. I've plugged the hub into one, and that will be all peripherals, and then I'll switch out the external HD and the zen on the other one.