XYplorer Beta Club

Is it possible to set a script in Custom File Icons dialog window so that I get, for example, custom icon for every removable drive or every USB connected, even if the drive letter is the same?
I tried some stuff, but it didn't work...

No, it only displays icons, no scripting logic involved

What you're looking for is an autorun.inf file on each external device and in that file you can assign a custom icon (ofc that one needs to be on that drive)

Bummer... But thanks anyway.

I'm gonna jump in and suggest USBDLM. I use it for this purpose as USBDLM allows you to apply icons to drives based on variety of options: drive type, bus type, volume label, etc... (RTFM!!!).