USB1
Oh dear
Has this drive ever worked on your USB1
Some flash drives require drivers to be installed, as well.
But I'm concerned about the USB1 only option. It must be an older computer, quite old !
You can purchase a new PCI (internal PCI card) for your computer, for as low as $15, which will enable you to run USB2 devices, (From eBay)
I think this is your best option
Basically I don't want to get stuck down on trying to get your old USB1 working