wrote:

In which folder are the 'INSTALLED' USB drivers stored in 98se?

You don't need to be asking that question.

What you want is the NUSB version 3.6 driver, which can be downloaded
from he

http://www.tmeeco.eu/9X4EVER/GOODIES/nusb36e.exe

The typical instructions for installing NUSB is:

- unplug all USB devices from your computer
- go into device manager and delete everything related or mentioning
USB. I believe that includes device hubs, controllers, etc.
- reboot the computer, say no or cancel any attempts by win-98 to allow
itself to find or install drivers for new detected hardware
- run the nusb36e file, then reboot

I suppose before deleting anything in device manager you could just run
nusb36e and see if you can access the usb storage devices in question,
and if it doesn't then follow the above instructions and try again.

Also, note that if you are trying to access SD cards that are 4 gb or
larger, you should be aware that the vast majority of SD card readers
will not read those cards (they are based on an older SD-card format).
There are SD card readers that will work under win-98 that will read SD
cards 4 gb and larger (I have such card readers, and have tested them up
to 64 gb).