windows - Rename multiple files adding a unique string

I am using Windows XP operating system, I have a folder with multiple files, e.g.:

• ERHS 34334.jpg


• ERHS 12123.jpg


• ERHS 98484.jpg

I want to rename all those files at once as like below:

• ERHS 34334_thumb.jpg


• ERHS 12123_thumb.jpg


• ERHS 98484_thumb.jpg

Existing name should not change; I want to add some unique string to the end.

Answer

In Command Prompt:

for %f in (ERHS*.jpg) do ren "%f" "%~nf_thumb.jpg"