Delta is the number of seconds since the last frame. So to get the number of milliseconds, you can just do delta*1000

I use both a physical sim (personal) and eSim (work) with a second eSim that I can enable and recharge when going outside of the EU so I don’t get huge roaming charges. When I’m at home it’s disabled so I only have the other two active

Check out Xnconvert, it’s completely free and was made for things like this. You can do a bunch of different actions on a set of images and specify where and how to save the output files.

Google ignores robots.txt so that won’t do much I’m afraid. You need to add special tags in the header of every page to block Google from indexing that page: source