It’s highly unlikely Windows 2000 has the drivers to support USB 3.0. And since Microsoft doesn’t support Windows 2000 any longer finding a driver or driver update is slim to none. I don’t remember but I think Windows XP didn’t have drivers for USB ports at all.
Then there is the question of the pc’s USB port on equipment that old. Oxidized contacts? Nicotine covered contacts? Main board’s controllers capable of supporting USB 3.0?
Is the USB port on the Windows 2000 machine being used for more than the SanDisk drive? That can cause power problems to the device.
And this isn’t a USB 3.0 problem per say since most if not all USB 3.0 devices support USB 2.0 ports.