Windows 10: Making hundreds of USB-sticks with ALMOST identical files

In short:
I have to make ~500 USB-sticks containing loads of documentation, most of which will be identical. However, each stick will have several unique files on it as well.

Does anyone know of a way to make this less tedious?
Currently my tactic will be to put the non-unique pack on the sticks, then manually drag over the unique files. This done in batches of ~20 (or however big a USB-hub I can find).

I'd be interested in some way to rename USB-sticks in batches as well.

Thanks in advance

 

Installing windows off of a USB stick

Step By Step from vista:
From admin cmd prompt

1. diskpart
1a. list disk
2. select disk 1 (replace 1 with your usb drive)
3. clean
4. create partition primary
5. select partition 1 (replace 1 with your usb drive)
6. active
7. format fs=fat32
8. assign
9. exit

Copy Windows Vista's DVD ROM content to the Flash Drive

xcopy d:\*.* /s/e/f e:\ (d being your vista cd and e being your usb stick)

And that's it, boot off your usb disk

 

Best way to make a bootable WIndows 10 image on USB with all existing softwares, drivers & configurations to deploy on identical hardwares?

Best way to make a bootable Windows 10 image on USB with all existing software, drivers & configurations to deploy on exactly identical hardware?

There is no difference in the hardware we want to deploy that image on.

Planning to deploy this image on over 4000 desktops of same hardware configuration and make and model.

Is there a freeware/opensource/free software that we can use for this purpose commercially?

can you suggest a solution and KB article where it's step by step explained how to achieve it or do it?

 

How can I compare 2 file folders in Explorer to see if they are identical with information?

I am trying to compare 2 file folders on my laptop and USB drive. I want to open them at the same time and do some sort of file compare to make sure they are identical. Can anyone suggest the steps to do this? Thank you!