On Sunday, March 6, 2016 at 9:12:44 PM UTC-7, wrote:
In which folder are the 'INSTALLED' USB drivers stored in 98se?

I got a driver file that is supposed to recognise all flash
drives.(Whether it works is just a matter of trying it). Presently I can
only access a few of these flash drives and they are all 4gb or less. I
want to try this file, but I hate risking losing all the individual
drivers I have installed over the years, because I have no idea what I
installed or if I even have these drivers anymore.

Although I do have a complete backup of the entire Windows folder for
Win98, I know it can be a hassle restoring the whole thing. I'd like to
just backup the folder (or folders) where these drivers are stored, as
well as their settings, which I assume are stored in the registry.

What folder(s) do I need to backup, and what else?
And while I'm at it, what are the names and location of those registry
files?

I can dual boot to Windows 2000 to restore this stuff if necessary, by
simply copying them back to the Windows folder.

This is one thing I like about Win98, you cant do this in any newer
Windows.... Heck, I've copied my entire Windows folder and program files
folders to other computers, and after installing some drivers for the
new hardware, I have a working clone of my entire W98 install. You cant
do that in XP or higher....

We can't really know where to begin with so it's not going to be as easy as deleting a file in order to restore your machine back to what it was before the update was applied.

Nusb 3.6 is so extensive and only can run once so what I was going to do with it was install a very old program called total uninstall and log the changes done so I can go in and restore the registry stings back to allow a re-installation of nusb3.6, but haven't done that yet. The old Total Uninstall for 98 was free, today's offering is not and it's not the same guy even.

Which leaves you with the only viable option of imaging your windows now and saving that, applying the update and imaging again since you can't run nusb3.6 twice anyway and you will need to when it hits a bad pen drive like what happened to my 98 system. --I-- should be imaging in this day and age but again haven't got around to it.

I don't have the answer to your question. But the old total uninstall program would produce a log of all changes and then ideally, I would still make a new image to actually restore with.