Now that I have modified my .htaccess file to "cache" these files, where can I check to see if they are really being cached to my local machine rather than retrieving from file server?
Jim
Go to your website , example below is Chrome
Right Click somewhere in the heading, choose
inspectBottom part changes
Hit the refresh page in the address area (round arrow)
In the bottom part you can now see if the files come from your server, memory cache, disk cache a.s.o.
The attached screen-shot shows that Chrome is loading most parts of your page from the cache.
Wim
P.s. you can see errors on your pages when you click the console-tab