I did a lot of searching and this is what I found.

Win XP PC is UB2
All flash (pen) drives here.

A 128G USB3 works just fine there.
An identical USB3 128G drive will not register.
In order to allow the first 128 USB3 drive to work I had to unplug one
of the other drives I had plugged in.
Seems that I hit the wall on the number of USB drives.
I had two plugged in and was adding a third.


The 32G flash drive was read only and I could not get it to change that
in the Win XP Pro pc.
I plugged it into a Win 7 Pro PC and ran a
Properties/Tools/Error-Checking Check Now and the read only was
automatically removed. Works now in the Win XP Pro PC just fine.

What a pain !